Spiral CT Scan Research Articles

Cross-Domain Denoising for Low-Dose Multi-Frame Spiral Computed Tomography.

Computed tomography (CT) has been used worldwide as a non-invasive test to assist in diagnosis. However, the ionizing nature of X-ray exposure raises concerns about potential health risks such as cancer. The desire for lower radiation doses has driven researchers to improve reconstruction quality. Although previous studies on low-dose computed tomography (LDCT) denoising have demonstrated the effectiveness of learning-based methods, most were developed on the simulated data. However, the real-world scenario differs significantly from the simulation domain, especially when using the multi-slice spiral scanner geometry. This paper proposes a two-stage method for the commercially available multi-slice spiral CT scanners that better exploits the complete reconstruction pipeline for LDCT denoising across different domains. Our approach makes good use of the high redundancy of multi-slice projections and the volumetric reconstructions while leveraging the over-smoothing issue in conventional cascaded frameworks caused by aggressive denoising. The dedicated design also provides a more explicit interpretation of the data flow. Extensive experiments on various datasets showed that the proposed method could remove up to 70% of noise without compromised spatial resolution, while subjective evaluations by two experienced radiologists further supported its superior performance against state-of-the-art methods in clinical practice. Code is available at https://github.com/YCL92/TMD-LDCT.

Visualization of X-ray fields, overlaps, and over-beaming on surface of the head in spiral computed tomography using computer-aided design-based X-ray beam modeling.

To visualize the X-ray fields, overlaps, and over-beaming on the skin surface during spiral head CT scanning. The measured pitch factors were determined by measuring 3 rotation times, 11 table-feed speeds, and an X-ray beam width. The X-ray fields, overlaps, and over-beaming on the skin surface were calculated via computer-aided design-based X-ray beam modeling, and the values obtained using the nominal pitch and measured pitch factors were compared. The X-ray fields with measured pitch factors exceeded those with nominal pitch factors. The overlaps increased with a decrease in the nominal pitch and measured pitch factors and were observed even at a nominal pitch factor of 1.0. The most stretched over-beaming field was observed with the measured pitch factor of 0.670. The technique can show the overlaps of the X-ray fields and may determine the adequate start angle to prevent overlaps to the eye lens.

Retrospective analysis of 62 cases who received clinical application of artificial temporomandibular joint

Objective: To conduct a retrospective study on the treatment outcomes of patients who underwent artificial temporomandibular joint (TMJ) replacement surgery and to evaluate the effectiveness of artificial TMJ treatment. Methods: This study selected 62 patients who received standard Biomet artificial TMJ treatment at Department of Orthognathic and TMJ Surgery, West China Hospital of Stomatology, Sichuan University from May 2010 to September 2023 as the study subjects. Among them, there were 15 male patients and 47 female patients. The average age was 33.5 years old(ranging from 18 to 67 years). This study statistically analyzed postoperative indicators, including maximum mouth opening, forward jaw movement, lateral movement, postoperative pain scores, and patient satisfaction. Results: This study included a total of 62 patients with 99 TMJ joints. No infections occurred postoperatively. The average follow-up period was 33.7 months (ranging from 7 to 170 months). At 6 months postoperatively, the mean mouth opening was (36.1±6.2) mm, lateral movement was (2.1±0.9) mm, and forward jaw movement was (1.0±0.9) mm. The pain visual analog scale score at 6 months postoperatively was (2.8±0.6), and patient satisfaction with the surgery was (8.8±1.1). Spiral CT scans conducted after surgery showed no joint dislocation or migration, and the artificial joint remained stable during the follow-up period. Conclusions: Artificial TMJ replacement is a valuable method for effectively restoring TMJ structure and essential functions related to mouth opening and chewing. It is worthy of promotion as a reconstructive approach for the temporomandibular joint.

Patient radiation risk reduction by controlling the tube start angle in single and dual source spiral CT scans: A simulation study.

Organ doses in spiral CT scans depend on the tube startangle. To determine the effective dose in single source CT (SSCT) and dual source CT (DSCT) scans as a function of tube start angle and spiral pitch value to identify the dose reduction potential by selecting the optimal startangle. Using Monte Carlo simulations, dose values for different tube positions with an angular increment of and a longitudinal increment of were simulated over a range of with collimations of , , and . The simulations were performed for the thorax region of six adult patients based on clinical CT data. From the resulting dose distributions, organ doses and effective dose were determined as a function of tube angle and longitudinal position. Using these per-view dose data, the individual organ doses, as well as the total effective dose, were determined for spiral scans with and without tube current modulation (TCM) with pitch values ranging from 0.5 to 1.5 for SSCT and up to 3.0 for DSCT. The dose of the best and worst tube start angle in terms of dose was determined and compared to the mean dose over all tube startangles. With increasing pitch and collimation, the dose variations from the effective dose averaged over all start angles increase. While for a collimation of , the variations from the mean dose value stay below for SSCT, we find that for a spiral scan with a pitch of 3.0 for DSCT with TCM and collimation of , the dose for the best starting angle is on average lower than the mean value and lower than the maximumvalue. Variation of the tube start angle in spiral scans exhibits substantial differences in radiation dose especially for high pitch values and for high collimations. Therefore, we suggest to control the tube start angle to minimize patientrisk.

A Novel Technique for Repairing Alveolar Clefts: Computer-Assisted Design With Posterior of Mandible Block Bone Grafts

Objective: Iliac cancellous bone graft is the gold standard for the treatment of alveolar clefts. However, the resorption rate of iliac cancellous bone is generally high. In this study, the authors propose a new method for repairing alveolar clefts using block bone grafts in the posterior region of the mandibular molar and the anterior margin of the ascending branch. Methods: Ten patients with a diagnosis of unilateral or bilateral alveolar cleft were collected. Block bone grafting between the posterior mandibular molar region and the inner and outer oblique lines of the anterior margin of the ascending branch was used to treat the alveolar synostosis. Preoperative, 1-week postoperative, and 6-month postoperative multislice spiral computed tomography scans of the patients were collected and analyzed for preoperative design and postoperative graft bone morphology using computer-assisted software tools, which were also required to measure the changes in the bone tissue density in the posterior mandibular bone extraction area. Results: At 6 months postoperatively, the mean bone resorption rate of the posterior mandibular bone grafts for cleft alveolar processes was 33.96% ± 11.23%. Bone tissue density in the posterior mandibular bone grafting area recovered to near preoperative levels at 6 months postoperatively. Conclusion: The novel method of bone grafting for the cleft alveolar process used in this paper is really effective. Postoperative posterior mandibular bone extraction did not cause sequelae such as mandibular bone defects or poor morphology in the patients. Computer-assisted design and three-dimensional printing technology helped to improve intraoperative bone grafting accuracy and postoperative assessment.

Post-BSSO condylar position stability: a comparison of miniplate and lag screw fixation

BackgroundThis study was conceived to assess the postoperative stability of condylar position following fixation with miniplates and lag screws after bilateral sagittal split osteotomy (BSSO).MethodsThis retrospective study included a cohort of 20 patients undergoing BSSO using the Obwegeser-Dal Pont modification. The bony segments were stabilized using either miniplates with two 2.0-mm monocortical screws per segment or three 2.0-mm bicortical lag screws along the mandible’s superior border. Pre- and postoperative (7-day interval) spiral computed tomography scans were conducted to assess skeletal changes across both groups. Data analysis employed Wilcoxon signed-rank and Wilcoxon rank-sum tests (α = 0.05).ResultsNo statistically significant difference was observed between the pre-and postoperative condylar position parameters (P>0.05). However, the lag screw group showed a marginal significant increase in the left condyle’s angulation (preoperative: 24.83 ± 6.37 vs. postoperative: 32.5 ± 4.93; P = 0.04). Changes in condylar height, length, and width were not statistically significant before and after BSSO in either groups (P>0.05). Nor was any statistically significant difference found between the miniplates and lag screws groups regarding condylar position parameters (P>0.05).ConclusionThe results indicated that both lag screw and miniplate fixation methods can be effectively employed in BSSO procedures without impacting condylar position parameters. Thus, either fixation method can be chosen depending on factors such as the surgeon’s preference and clinical outcomes.

Life-threatening constrictive pericarditis accompanied by synthetic cannabinoid use: A case report and literature review

Rationale: Synthetic cannabinoids are increasingly used as recreational drugs and have been associated with adverse cardiovascular effects. However, reports of synthetic cannabinoids accompanied by constrictive pericarditis are limited. Patient’s concern: A 28-year-old male with a history of synthetic cannabinoid (Bonzai) abuse presented with chest discomfort, dyspnea, and lower extremity edema. Investigations revealed reduced left ventricular ejection fraction, elevated inflammatory markers, low electrocardiogram voltages, and atrial fibrillation. Diagnosis: Chest spiral computerized tomography scan and chest X-ray demonstrated pericardial calcification. Cardiac magnetic resonance imaging and right heart catheterization were done to confirm the possibility of constrictive pericarditis. Based on the patient’s addiction history and exclusion of rheumatologic and infectious causes, it was supposed that constrictive pericarditis and cardiomyopathy may be accompanied by synthetic cannabinoid use. Interventions: The patient received standard medical therapy, including loop diuretics for cardiomyopathy and constrictive pericarditis. Catheter ablation was recommended for his rhythm control, and he was planned for close monitoring of clinical and echocardiographic response and evaluation of the need for surgical pericardiectomy in the future. Outcomes: After 6 months follow-up, echocardiographic exam revealed no significant improvement in ventricular function. However, due to the high surgical risk, the patient’s poor compliance, and the continuation of drug abuse, he was not a good candidate for surgery according to our heart team’s decision. Lessons: Synthetic cannabinoids can trigger constrictive pericarditis, and clinicians should consider them when evaluating patients with compatible symptoms and exposure history. Further research on the cardiovascular effects of synthetic cannabinoids is needed and public education on potential harms is warranted.

Radiological image analysis based on the combined application value of multislice spiral CT and abdominal lavage in patients with acute purulent appendicitis

ObjectiveThe primary objective of this study is to conduct a clinical investigation involving abdominal lavage in patients with acute purulent appendicitis. The study aims to systematically assess the impact of abdominal lavage on complications within one week post-surgery and, in particular, focuses on the application value of multislice spiral CT in confirming these complications. By delving into the effects of different lavage timings on surgical outcomes and postoperative recovery, the study aims to provide scientific evidence for improving the efficacy of surgical treatment for acute purulent appendicitis. MethodsA total of 150 patients diagnosed with purulent appendicitis were selected for this study. They were divided into three groups: one group underwent preoperative abdominal lavage, another group underwent postoperative abdominal lavage , and a third group did not undergo abdominal lavage. The study aimed to compare the therapeutic outcomes among the three groups of patients. Additionally, the efficacy of the treatments was assessed by utilizing multislice spiral CT scans to confirm factors such as the abdominal abscess rate and the maximum diameter of abdominal abscesses one week postoperatively. ResultsThe operative time for patients in the experimental group showed no significant difference compared to the control group. However, postoperative pain scores were significantly lower in the experimental group (p<0.05), and the recovery time for gastrointestinal function was shortened (p<0.05) compared to the control group. The incidence of postoperative complications significantly decreased in the experimental group (p<0.05), while the control group exhibited higher complications. Additionally, the postoperative recovery status of patients in the experimental group was superior to that of the control group. ConclusionPerforming abdominal lavage in cases of purulent appendicitis can significantly alleviate postoperative pain, facilitate the recovery of gastrointestinal function, reduce the incidence of postoperative complications, and enhance overall surgical recovery. Therefore, we recommend using abdominal lavage during laparoscopic appendectomy to improve the surgical outcomes and postoperative recovery quality for patients. However, further large-scale studies are necessary to validate these results.

Clinical application of high-resolution spiral CT scanning in the diagnosis of auriculotemporal and ossicle

Precision and intelligence in evaluating the complexities of middle ear structures are required to diagnose auriculotemporal and ossicle-related diseases within otolaryngology. Due to the complexity of the anatomical details and the varied etiologies of illnesses such as trauma, chronic otitis media, and congenital anomalies, traditional diagnostic procedures may not yield accurate diagnoses. This research intends to enhance the diagnosis of diseases of the auriculotemporal region and ossicles by combining High-Resolution Spiral Computed Tomography (HRSCT) scanning with Deep Learning Techniques (DLT). This study employs a deep learning method, Convolutional Neural Network-UNet (CNN-UNet), to extract sub-pixel information from medical photos. This method equips doctors and researchers with cutting-edge resources, leading to groundbreaking discoveries and better patient healthcare. The research effort is the interaction between the CNN-UNet model and high-resolution Computed Tomography (CT) scans, automating activities including ossicle segmentation, fracture detection, and disruption cause classification, accelerating the diagnostic process and increasing clinical decision-making. The suggested HRSCT-DLT model represents the integration of high-resolution spiral CT scans with the CNN-UNet model, which has been fine-tuned to address the nuances of auriculotemporal and ossicular diseases. This novel combination improves diagnostic efficiency and our overall understanding of these intricate diseases. The results of this study highlight the promise of combining high-resolution CT scanning with the CNN-UNet model in otolaryngology, paving the way for more accurate diagnosis and more individualized treatment plans for patients experiencing auriculotemporal and ossicle-related disruptions.

Thyroid Absorbed Dose from Brain CT Examinations in Different Age Groups of Pediatric Based on Monte Carlo Simulation

Background: This study was designed to assess the thyroid absorbed dose from brain computed tomography (CT) scans across various pediatric age groups, utilizing Monte-Carlo simulation and thermoluminescent dosimeters (TLDs). Methods: We used the Monte Carlo N-particle (MCNP) transport code to model the spiral CT scan of the brain and calculated the average thyroid dose for each pediatric age group. Techniques for variance reduction, such as Time cutoff, Energy cutoff, and Russian roulette, were implemented. Additionally, a cross-sectional study measured the average thyroid absorbed dose in 45 patients under 20 years using TLD dosimetry. The data were analyzed with SPSS software at a 95% confidence interval (CI). Results: The absorbed thyroid dose for an irradiation time of 1 second and 120 mA across the age groups 0 - 5, 6 - 10, 11 - 15, and 16 - 20 years for boys was 4.165 ± 0.028, 3.802 ± 0.036, 3.861 ± 0.031, and 3.021 ± 0.029 mGy, respectively, and for girls, it was 4.185 ± 0.024, 3.852 ± 0.044, 4.052 ± 0.028, and 4.072 ± 0.047 mGy, respectively. For a dose of 110 mAs, the results for boys were 3.711 ± 0.037, 3.660 ± 0.026, 3.251 ± 0.019, and 3.204 ± 0.031 mGy, respectively, and for girls were 3.882 ± 0.040, 3.842 ± 0.032, 3.412 ± 0.026, and 3.619 ± 0.029 mGy, respectively (P &lt; 0.001). Conclusions: Comparing these results with experimental studies indicates the feasibility of using less computationally intensive methods. The thyroid dose received by girls was higher than that for boys, aligning with findings from experimental studies and other research.

Application Analysis of AI Technology Combined with Spiral CT Scanning in Early Lung Cancer Screening

At present, the incidence and fatality rate of lung cancer in China rank first among all malignant tumors. Despite the continuous development and improvement of China's medical level, the overall 5-year survival rate of lung cancer patients is still lower than 20% and is staged. A number of studies have confirmed that early diagnosis and treatment of early stage lung cancer is of great significance to improve the prognosis of patients. In recent years, artificial intelligence technology has gradually begun to be applied in oncology. ai is used in cancer screening, clinical diagnosis, radiation therapy (image acquisition, at-risk organ segmentation, image calibration and delivery) and other aspects of rapid development. However, whether medical ai can be socialized depends on the public's attitude and acceptance to a certain extent. However, at present, there are few studies on the diagnosis of early lung cancer by AI technology combined with SCT scanning. In view of this, this study applied the combined method in early lung cancer screening, aiming to find a safe and efficient screening mode and provide a reference for clinical diagnosis and treatment.

3D PRINTING IN COMPLEX TIBIAL FRACTURE CLASSIFICATION & PLANNING.

Tibial plateau fractures are common intra-articular fractures that pose classification and treatment challenges for orthopedic surgeons. This study examines the value of 3D printing for classifying and planning surgery for complex tibial plateau fractures. We reviewed 54 complex tibial plateau fractures treated at our hospital from January 2017 to January 2019. Patients underwent preoperative spiral CT scans, with DICOM data processed using Mimics software. 3D printing technology created accurate 1:1 scale models of the fractures. These models helped subdivide the fractures into seven types based on the tibial plateau's geometric planes. Surgical approaches and simulated operations, including fracture reduction and plate placement, were planned using these models. The 3D models accurately depicted the direction and extent of fracture displacement and plateau collapse. They facilitated the preoperative planning, allowing for precise reconstruction strategies and matching intraoperative details with the pre-printed models. Post-surgery, the anatomical structure of the tibial plateau was significantly improved in all 54 cases. 3D printing effectively aids in the classification and preoperative planning of complex tibial plateau fractures, enhancing surgical outcomes and anatomical restoration. Level of Evidence IV, Prospective Study.

COMPLETE REHABILITATION OF ORTHODONTIC PATIENTS AND PREVENTION OF RECURRENCES

Emotional instability of children leads to the development of oral habits or adaptive type of swallowing. They are ways of adaptation to existing chronic stress. Oral habits play an important role in the appearance of number of orthodontic anomalies of the occlusion or worsen the conditions of treatment of such a patient.&#x0D; The purpose of the study. Improving the effectiveness of the complex treatment of maxillomandibular anomalies among the patients with pathological occlusion, with primary swallowing and oral habits is important. Only an etiological approach to such clinical cases gives the desired result.&#x0D; Materials and methods. The article is based on a clinical and laboratory study conducted among patients aged 12-15 years who have oral habits (sucking fingers or other objects, breathing through the mouth, resting the head on the hands, sleeping in an uncomfortable position, having a primary swallowing). 15 people of the comparison group without maxillomandibular anomalies, oral habits, with normal swallowing and 60 patients with acquired maxillomandibular anomalies were examined. An important point of the clinical examination was the external oral examination with determination of the way of swallowing and breathing, determination of the condition of the TMJ. The patients were given the STAI testify, a secret questionnaire in order to identify stress factors that affect the body, and the relationship between the presence of a stress factor and the appearance of changes in the maxillofacial area was studied. We studied and analyzed the data of computed tomograms of 60 patients with acquired maxillomandibular anomalies, deformities, 15 tomograms of persons of the norm group. X-ray methods included examination of the patient on a spiral computed tomography scan TOSHIBA Aquilion PRIME 160-slices MODEL TSX-302A / 1C. The scan was performed according to a specially developed protocol. The results of the cephalometric study before and after the treatment were evaluated, and they were compared with the results of the clinical examination.&#x0D; Results. The obtained results of the STAI testify to the state of chronic tension of patients, a feeling of emotional relief during the period of using an oral habit. The results of the examination and photo report confirm pronounced changes in the symmetry and proportionality of the face, where there is an oral habit. Patients had complex treatment with non-removable Appliance (Hyrex, MARPE), braces systems in combination with myogymnastics.&#x0D; If there was a primary swallowing or hidden mouth breathing, the treatment began with labial therapy with FroggyMouth Appliance (France). The results of a cephalometric study confirm the presence of an acquired rather than a congenital deformation of the facial skeleton. Adaptive changes on the part of the maxillomandibular and the muscular system indicate the long-term effect of oral habits on the maxillofacial area and confirm the existence of a functional facial matrix.&#x0D; Conclusions. Constant systematic struggle with oral habits and atipical swallowing in the complex treatment of patients with maxillomandibular anomalies is an important and necessary stage. Only elimination effect of the etiological factor can prevent a relapse of a disease. The long-term results of the treatment indicate that after the treatment, the clinical and cephalometric characteristics of the maxillomandibular bones and the muscular apparatus normalize in patients.

Finite element analyses of three minimally invasive fixation techniques for treating Sanders type II intra-articular calcaneal fractures

Background and objectiveCalcaneal Sanders type II or III fractures are highly disabling with significant burden. Surgical treatment modalities include open reduction and internal fixation (ORIF) techniques and a variety of minimally invasive surgical (MIS) approaches. ORIF techniques are associated with complications and traditional MIS techniques need extensive intraoperative fluoroscopic procedures. The present study aims to investigate the effects of three different minimally invasive internal fixation (MIIF) techniques used to treat Sanders type II intra-articular calcaneal fractures using finite element analyses.MethodsA 64-row spiral computed tomography scan was used to observe the calcaneus of a healthy adult. The scanning data were imported into Mimics in a DICOM format. Using a new model of a Sanders type II-B intra-articular calcaneal fracture, three minimally invasive techniques were simulated. Technique A involved fixation using an isolated minimally invasive locking plate; Technique B used a minimally invasive locking plate with one medial support screw; and Technique C simulated a screw fixation technique using four 4.0-mm screws. After simulating a 640-N load on the subtalar facet, the maximum displacement and von Mises stress of fragments and implants were recorded to evaluate the biomechanical stability of different fixation techniques using finite element analyses.ResultsAfter stress loading, the maximum displacements of the fragments and implants were located at the sustentaculum tali and the tip of sustentaculum tali screw, respectively, in the three techniques; however, among the three techniques, Technique B had better results for displacement of both. The maximum von Mises stress on the fragments was < 56 Mpa, and stress on the implants using the three techniques was less than the yield strength, with Technique C having the least stress.ConclusionAll three techniques were successful in providing a stable fixation for Sanders type II intra-articular calcaneal fractures, while the minimally invasive calcaneal locking plate with medial support screw fixation approach exhibited greater stability, leading to improved enhancement for the facet fragment; however, screw fixation dispersed the stress more effectively than the other two techniques.

MDCT appearances of pancreatic insulinoma as well as the other well differentiated endocrine tumors

Introduction: Pancreatic endocrine tumors (PETs) are primarily well-differentiated tumors composed of cells that resemble normal islet cells but that arise from pancreatic ductal cells. They are classified as functioning or nonfunctioning according to their associated clinical symptoms; insulinomas, gastrinomas and glucagonomas are the most common function­ing PETs Case Report: A 36-years old man presented with a one-month history of fainting attacks and dizziness, symptoms of hypoglycemia such as hunger, sweating, palpitations, loss of consciousness and syncope. We tried abdominal enhanced spiral CT to localize the tumor, but that wasn’t successful. Therefore, we tried a new method of MD spiral CT scanning and localized the tumor. Discussion and Conclusion: Insulinomas are the commonest islet cell tumors of the pancreas, followed by gastrinomas. Preoperative localization is very helpful in planning the operation: it allows the surgeon to determine whether simple tumor resection or partial pancreatectomy is likely to be required.

Division of neuromuscular compartments and localization of the center of the intramuscular nerve-dense region in pelvic wall muscles based on Sihler's staining.

The innervation of the pelvic wall muscles is not very clear. This study aimed to reveal the division of neuromuscular compartments and localize the surface position and depth of the center of the intramuscular nerve-dense region (CINDR) of the pelvic wall muscles based on Sihler's staining. Twenty-four adult cadavers were used. To localize the CINDR of the pelvic wall muscles, horizontal (H) and longitudinal (L) reference lines were drawn, and Sihler's staining was used to reveal the intramuscular nerve distribution. The CINDR projection points (P and P' points) behind and in front of the body surface, the positions of the P points projected onto the H and L lines (PH and PL points), and the depth of CINDR were determined by spiral computed tomography scanning. The piriformis and obturator internus muscles can be divided into two and three neuromuscular compartments, respectively. The PH of CINDR of the piriformis muscle was located at 22.61 ± 2.66% of the H line, the PL was at 28.53 ± 6.08% of the L line, and the puncture depth of the piriformis muscle was at 24.64 ± 2.16% of the PP' line. The PH of CINDR of the obturator internus muscle was at 16.49 ± 1.20% of the H line, the PL was at 10.94 ± 1.09% of its L line, and the puncture depth was 6.26 ± 0.38cm. These findings may guide the design of the compartmentalized transplantation of the pelvic wall muscles and improve the target localization efficiency and efficacy for injecting botulinum toxin A to treat pelvic wall muscle spasm.

Computed Tomography and 3-D Face Scan Fusion for IoT-Based Diagnostic Solutions

In clinical diagnosis, multimodal medical image fusion is meaningful and necessary, for the reason that some diseases need to be diagnosed in combination with the situation of different tissues of patients. Spiral computed tomography realizes the high-precision and smooth reconstruction of bone tissue, while it can not represent the color and texture information in soft tissue reconstruction with high accuracy. The face scan precisely records the color and shape of the maxillofacial region. The diagnosis of some diseases (like cavernous hemangioma and jaw deformity caused by idiopathic condylar resorption) needs to combine the information of maxillofacial soft tissue and bone, so it is of great significance to fuse spiral CT and face scan images. In this paper, a novel intelligent IoT scene is proposed: a multimodal medical images acquisition and fusion system, and by combining CT machine and face scan equipment, the CT and face scan of patients can be synchronously collected. Deep point neural networks are used to extract feature points and a threshold iterative closest point algorithm performing registration with deep feature points and contributed region segmentation is applied. Finally, high-precision fused modal data is output at the mobile terminal to facilitate diagnosis and analysis and improve the efficiency of doctor-patient communication. Quantitative experiments show promising results, and clinical experiments prove that our method enables patients and doctors to better understand the state of an illness and improves the efficiency of doctor-patient communication.

Retracted: Diagnostic Value of Spiral CT and Magnetic Resonance Imaging Scanning in Gastric Cancer and Precancerous Lesions.

[This retracts the article DOI: 10.1155/2022/3627385.].

Aggressive Behavior in a Critically Ill COVID-19 Patient: Possible Role of Medication Discrepancies

Coronavirus disease 2019 (COVID-19) has different clinical manifestations that besides its iatrogenic intervention could affect brain cognitive function. Medication omission has serious effects on a patient’s clinical course changing the disease’s mortality and morbidity; herein possible role of the iatrogenic intervention that increased the risk of psychological disturbance including medication omission was reported.&#x0D; A 40-years-old man with a history of gout treated with allopurinol was admitted due to productive cough and hemoptysis. His physical exam and lung spiral chest CT scan revealed moderate to severe lung infiltrations in favor of COVID-19 which was confirmed with COVID-19 RT-PCR. Due to his clinical course tocilizumab, methylprednisolone pulse, and other conservative therapies were started while allopurinol was omitted. During his hospitalization anxiety and irritability appeared and progressed gradually making him refuse to get oxygen supplementation. Through immediate intervention and controlling his behavioral symptoms with psychotherapy, selective serotonin reuptake inhibitors, benzodiazepines, and initiation of allopurinol, the patient’s psychological disturbance were relieved. In the end, he died due to acute respiratory distress syndrome.&#x0D; COVID-19 and its iatrogenic interventions could trigger a psychiatric disturbance in patients with a variety of pathways. Corticosteroid therapy, non-hypnotic antihistamines, quarantine stress conditions, hypoxia, and medication omission are underlying factors for it. Reporting this medication omission would help physicians become familiar with this pharmacological phenomenon, its prevention, and the way to respond to it. On the other hand, researchers can study the etiology of this phenomenon to understand the mood-stabilizing role of allopurinol in additional studies.

Strange Obturator Hernia: A Case Report with Literature Review

Obturator hernia is a rare pelvic hernia with incidence of 1%. It’s a significant cause of intestinal obstruction in emaciated elderly women. Delayed diagnosis and surgical intervention contributed to its relatively high morbidity and mortality. We present a case of an elderly woman with occlusive syndrome. The diagnosis of a strange obturator hernia was confirmed by a spiral CT scan. The bowel was located between the external obturator and pectineal muscles, corresponding to a mechanical obstruction upstream of a right obturator hernia. During the emergency laparotomy, the surgeon performed a gentle reduction of the incarcerated small bowel which was viable and closure of the obturator foramen by plication of the parietal peritoneum. The patient recovered uneventfully and no recurrence occurred during the follow-up. The obturator hernia should be included in the differential diagnosis if clinically suspected. Early diagnosis and prompt surgical treatment are essential to reduce the morbidity and mortality associated with obturator hernia.