64-slice Spiral CT Research Articles

Imaging Effect and Accuracy Analysis of 64-Slice Spiral CT in the Diagnosis of Coronary Artery Stenosis

Objective: To analyze the imaging effect and accuracy of 64-slice spiral CT in the diagnosis of coronary arterystenosis. Methods: 30 patients with suspected coronary heart disease admitted to our hospital from March 2022 to March 2023 were selected. All patients underwent both 64-slice spiral CT and digital subtraction angiography (DSA). DSA is considered the gold standard for diagnosis, so it was used to analyze the diagnostic performance of 64-slice spiral CT. Results: (1) The diagnostic results of digital subtraction angiography and 64-slice spiral CT was analyzed and compared with each other. The 64-slice spiral CT had an accuracy of 96.67% (29/30), a sensitivity 96.55% (28/29), and a specificity of 100.00% (1/1) in diagnosing coronary artery stenosis. (2) There was no significant difference between 64-slice spiral CT and digital subtraction angiography in the positive detection rate of anterior descending artery lesion, the positive detection rate of left main lesion, the positive detection rate of left circumflex artery lesion and the positive detection rate of right coronary artery lesion (P > 0.05). (3) There was no significant difference between 64-slice spiral CT examination and DSA examination in identifying mild stenosis, moderate stenosis, and severe stenosis of coronary arteries (P > 0.05). Conclusion: 64-slice spiral CT examination can accurately determine the degree of occlusion of coronary arteries, which allows for the accurate diagnosis of coronary artery stenosis.

569 Resection of Massive Pelvic Chondrosarcoma Using Custom Made 3D Printed Jig: A Case Report

Abstract Background The pelvis is a complex structure associated with major neurovascular structures and so pelvic surgery can be challenging. In the field of skeletal tumours, the surgeon's main aim is to achieve adequate margins, which modern 3D printed technology can assist with. Method A 43-year-old man was found to have a 20(CC) x 13(AO) x 9.3(TR) cm chondrasarcoma at the inner aspect of the right iliac bone. The patient was consented for right sided type 1 hemipelvectomy and tumour resection using customised 3D Printed Jig. A 64-slice spiral CT pelvis was transferred to an image processing software (Materialise Mimics 21.0 and Materialise 3 Matic 13.0) to generate a 3D model. The Jig was printed by the FDM machine in ABS material and sterilised. Incision was made through standard ilioinguinal approach and tumour was visualised. Soft tissue was dissected over the posterior aspect of the Ilium for the placement of the jig and then fixed with k wire, following which osteotomy was done. Results Postoperatively the patient had no complications. At final follow up of 4 years, the patient was independently ambulant. Post op x-ray showed no signs of tumour recurrence at the operated site. Conclusions This case highlights the importance of preoperative planning and the use of modern technology in surgical resection. Customised 3D printed jigs help surgeons achieve good resections with R0 margins.

Retracted: Application of 64-Slice Spiral CT Imaging Technology Based on Smart Medical Augmented Reality in the Diagnosis of Foreign Bodies in the Respiratory Tract in Children.

[This retracts the article DOI: 10.1155/2021/9962997.].

Novel Corona Virus 2019 Disease: Assessment on High-Resolution Computed Tomography Thorax.

Objectives This particular study was undertaken to assess the role of high-resolution computed tomography (HRCT) thorax in diagnosing patients with novel Corona virus-2019 disease and screening suspected COVID-19 cases. It also involves an assessment of the severity of bilateral lung involvement in proven and suspected cases of COVID-19 infection. Materials and methods Two hundred and fourteen symptomatic cases referred to the department of radio-diagnosis were evaluated in this study. HRCT thorax was performed on SIEMENS Somatom Emotion 16-slice spiral CT. Initially, a tomogram was taken, followed by sections in the lung window at B90s, kVp 130, with a pitch of 1.15. The images are then reconstructed into 1.0-mm-thin slices. Radiologists then interpreted the scans for features of COVID-19 disease. Various imaging features and the severity of the disease were analysed in all patients. Results We observed that the male population was more affected by the disease (72% of the total cases). The most consistent and common HRCT finding is that of ground-glass opacity (GGO), which was present in 172 cases, corresponding to 78.4% of the cases. Crazy pavement appearance was seen in 41.2 % of the cases. Other findings included consolidation, discrete nodules surrounded by ground-glass opacification, subpleural linear opacities, and tubular bronchiectasis. Conclusion HRCT thorax plays an ideal role in diagnosing COVID-19 disease with high sensitivity and also provides prompt results as compared to RT-PCR. It also helps in grading the severity of the disease based on various patterns and the extent of lung parenchyma involved. Therefore, because of the immediate results and the ability to grade the disease, HRCT became invaluable in directing the treatment of COVID-19 disease.

Clinical Efficacy of Chemotherapy Regimen Combined with Levofloxacin in Patients with Pulmonary Tuberculosis Complicated with Type-2 Diabetes.

To evaluate the clinical efficacy of a chemotherapy regimen combined with levofloxacin in patients with pulmonary tuberculosis complicated with Type-2 diabetes. Total 80 patients with pulmonary tuberculosis complicated with Type-2 diabetes admitted to Baoding People's Hospital from January, 2019 to January, 2022 were randomly divided into two groups: the experimental group and the control group, with 40 cases in each group. Patients in the control group were given the conventional 2HRZE/10HRE regimen, while those in the experimental group were given the chemotherapy regimen 2HRZEL/6HRE combined with levofloxacin. Sixty four slice spiral CT was used for chest plain scan before and after treatment, respectively, to evaluate the absorption of lesions based on the range of lung lesions; Venous blood was drawn to detect the changes of oxidative stress indicators, the incidence of adverse drug reactions and the negative conversion rate of sputum tuberculosis bacteria in the two groups. After treatment, the efficacy of the experimental group was 90%, which was significantly higher than that of the control group (67.5%), with a statistically significant difference (p=0.01). After treatment, CD3+, CD4+, CD4+/CD8+ and other indicators in the experimental group were significantly higher than those in the control group, with a statistically significant difference (CD3+, p=0.01; CD4+, p=0.01; CD4+/CD8+, p=0.00), while CD8+ did not change significantly (p=0.92); The incidence of adverse reactions was 52.5% in the experimental group and 47.5% in the control group, with no statistically significant difference (p=0.66); The negative conversion rate of patients in the experimental group was significantly higher than that in the control group at one month, three months and six months after treatment, with a statistically significant difference (p<0.05). Chemotherapy combined with levofloxacin is a safe and effective regimen for patients' pulmonary tuberculosis complicated with Type-2 diabetes, boasting a variety of benefits such as improved clinical efficacy, ameliorated cellular immune status, a high negative conversion rate of sputum tuberculosis bacteria, and no significant increase in adverse reactions.

APPLICATION OF CT PULMONARY ANGIOGRAPHY WITH "ULTRA-DOUBLE-LOW" AND ITERATIVE MODEL RECONSTRUCTION FOR ACUTE PULMONARY EMBOLISM.

The study is to investigate the feasibility of computed tomography pulmonary angiography (CTPA) with iterative model reconstruction (IMR) and "Ultra-double-low" (Ultra-low dose, Ultra-low contrast agent volume). Thirty-six patients who tested positive for pulmonary embolism in CTPA were enrolled in the study. Another CTPA was performed 1 week after thrombolytic therapy. The first examination was routine CTPA (Routine Group) with the parameters as follows: automatic mA scanning, 120kV and image reconstruction by using iDose4 iterative reconstruction (Lever 4), iodine concentration and dose of contrast agent: 300mgI/ml and 0.5gI/kg, respectively. The latter one was ultra-low dose CTPA examination (Ultra-low Group): 40 mAs, 80kV and IMR (Lever 3), contrast agent: 300mgI/ml and 15mL, respectively. Effective dose (ED), CT dose index volume (CTDIvol), dose length product (DLP), attenuation of pulmonary artery, contrast noise ratio (CNR) and signal noise ratio (SNR) were recorded and calculated. The imaging qualities were subjectively assessed. The Eds/CTDIvols/DLPs of Ultra-low Group are lower than the Routine Group (P<0.05). The differences in attenuation between the two groups are not significant (P>0.05). The differences in CNR and SNR between the two groups are significant (P<0.05). The differences in imaging qualities between the two groups when subjectively assessed are not significant (P>0.05). The 256-slice spiral CT combined with IMR and "Ultra-double-low" is feasible for the acute pulmonary embolism examination and the radiation dose and the volume of contrast agent can be greatly reduced.

Exploration of the Value of 64-Slice Spiral CT Angiography in the Diagnosis and Differentiation of Intracranial Aneurysms

Exploration of the Value of 64-Slice Spiral CT Angiography in the Diagnosis and Differentiation of Intracranial Aneurysms

A Cohort Study to Evaluate the Efficacy and Value of CT Perfusion Imaging in Patients with Metastatic Osteosarcoma after Chemotherapy.

Objective A case-control study was conducted to explore the efficacy of cohort study and value of CT perfusion imaging in patients with metastatic osteosarcoma after chemotherapy. Methods Eighty patients with metastatic osteosarcoma treated in our hospital from March 2020 to December 2021 were divided into two groups. According to their different treatment methods, the chemotherapy+antiangiogenesis group had 36 cases and the chemotherapy group had 44 cases. All patients were scanned by 64-slice spiral CT before and after treatment. The differences of tumor volume and perfusion parameters before and after treatment were compared, and the correlation between perfusion parameters and tumor microvessel density (MVD) was analyzed. The receiver working curve (ROC curve) was used to evaluate the efficacy of the two groups after chemotherapy. Results Blood flow (BF), blood volume (BV), Pallak blood volume (PBV), and time to start (TTS) in the antitumor angiogenesis+chemotherapy group were significantly lower than those before treatment (P < 0.05). Microvessel density was positively correlated with PS, BF, BV, and PBV (P < 0.05). The reduction rate of BV and BF in the remission group after treatment was significantly higher than that in the nonremission group. When the BV and BF decline rates were 47.37% and 21.53% and the areas under the curve were 0.968 and 0.916, respectively, the diagnostic effect was the best. When the decrease rate of BV was 47.48% and the decrease rate of BF was 21.55%, the sensitivity was 94.72% and 89.56% and the specificity was 91.31% and 91.31%. Conclusion The reduction rate of BV and BF in CT perfusion imaging is of high value in evaluating the efficacy of radiotherapy and chemotherapy in patients with NSCLC and can provide more objective basis for observing the changes and judging the prognosis of osteosarcoma after treatment.

Morphological changes of upper airway in patients with obstructive sleep apnea hypopnea syndrome after H-UPPP

Objective:To investigate the morphological changes of the upper airway palatepharyngeal plane after modified uvulopalatopharyngoplasty（H-UPPP） in patients with obstructive sleep apnea hypopnea syndrome（OSAHS） and efficacy of the surgery. Methods:Thirty-six patients diagnosed as moderate to severe OSAHS in the Central Hospital of Wuhan from January 2016 to September 2019 were treated with H-UPPP. PSG and 64 slice spiral CT were performed before operation, 1 month, 3 months, 6 months, 1 year and 2 years after operation to evaluate the changes of AHI, LSaO₂, CT90, BMI and the minimum anterior and posterior axis diameter, left and right axis diameter and cross-sectional volume of velopharyngeal plane, respectively. Results:The AHI, LSaO₂, CT90, BMI were significantly improved, while the minimum anterior posterior axis diameter, left and right axis diameter and cross-sectional volume of velopharyngeal plane were enlarged in the maximum extent at one month after operation. The alteration of left and right axis diameter could be maintained until half a year after operation, but gradually retracted after 1 year after operation. The improvement of anterior and posterior axis diameter can only be maintained until 3 months after operation, and return to the preoperative level 2 years after operation; The minimum cross-sectional area improved significantly at 1 month after operation and decreased after 3 months, but there was still a significant improvement at 2 years after operation（P<0.05）. The change of AHI was similar to that of the minimum cross-sectional area, and there was still a significant difference at 2 years after operation（P<0.001）; The improvement of LSaO₂ was the most significant at 1 month after operation, which could be maintained until 3 months after operation, and then gradually recovered. The improvement of CT90 could be maintained until half a year after operation, and decreased significantly at 1 year after operation. BMI was still better than that before operation at 1 year after operation, but returned to the preoperative level at 2 years after operation. The improvement of AHI was mainly related to the minimum anterior posterior axis diameter and cross-sectional area of velopharyngeal plane, but not to the left and right axis diameters. Conclusion:The morphological changes of upper airway in patients with OSAHS after H-UPPP are mainly the improvement of anterior posterior diameter, left and right diameter and minimum cross-sectional area caused by removing the anatomical load of upper airway within 3 months after operation, but the reduction of anterior posterior diameter and minimum cross-sectional area gradually occurs after 3 months, resulting in the weakening of surgical effect.

64-Slice Spiral Computerized Tomography under Algebraic Reconstruction Algorithm in the Surgical Treatment of Acquired Immune Deficiency Syndrome Complicated with Gastric Cancer.

In order to deeply analyze the application of CT images based on artificial intelligence algorithm in clinical treatment of AIDS patients with gastric cancer, and to provide reference for intervention of AIDS patients with gastric cancer, a total of 100 AIDS patients with gastric cancer were included as the research objects. The patients with CD4+ T lymphocyte count less than 200 cells/µL were in the control group (50 cases), whereas those higher than 200 cells/µL were in the experimental group (50 cases). All the patients underwent 64-slice spiral CT scanning. An improved algebraic reconstruction technology (ART) under L0 algorithmic approach (L0-ART) was proposed, and compared with the total variation (TV), filtered back projection (FBP), and weighted total variation (WTV) models. The standard deviation (STD) and average processing time of the L0-ART algorithm were significantly lower than those of the TV, FBP, and WTV algorithms (P < 0.05). The operation time of the experimental group was longer than that of the control group; the intraoperative blood loss, the diameter of the surgical wound, the time of first farting, the length of hospital stays, and the incidence of adverse reactions were all greatly lower than those of the control group (P < 0.05). Postoperatively, the total adipose tissue (TAT), visceral adipose tissue (VAT), and subcutaneous adipose tissue (SAT) in the abdominal area were higher in the experimental group than those in the control group (P < 0.05). In conclusion, the improved L0-ART algorithm proposed in this study had an excellent processing effect on CT images with a clinical promotion value. Patients with CD4+ T lymphocytes over 200 cells/µL had better surgical outcomes and prognosis than those with less than 200 cells/µL.

Adoption of Two-Dimensional Ultrasound Gastrointestinal Filling Contrast on Artificial Intelligence Algorithm in Clinical Diagnosis of Gastric Cancer.

This research was aimed to explore the value of gastrointestinal filling contrast-enhanced ultrasound (CEUS) and computed tomography (CT-)-enhanced scanning based on artificial intelligence (AI) algorithm in the evaluation of gastric cancer staging. 102 patients with gastric cancer were selected as the research objects. All of them underwent CEUS of gastrointestinal filling and 64-slice spiral CT before surgery. In addition, an improved mean shift algorithm was proposed based on differential optical flow and deep convolutional neural network (D-CNN), which was applied in image processing. The predicted positive rate (PPR), sensitivity, specificity, and accuracy of gastric cancer in different stages by CEUS and CT were calculated using pathological diagnosis results as the gold standard. 17 patients with T1 stage, 41 patients with T2-T3 stage, and 35 patients with T4 stage were detected by CEUS. 13 patients with T1 stage, 34 patients with T2-T3 stage, and 30 patients with T4 stage were detected by CT enhanced examination. The PPRs of CEUS for T1, T2-T3, and T4 stages of gastric cancer were higher than those of CT enhanced (P < 0.05). The PPR of CEUS for N0 staging of gastric cancer was higher than that of CT enhanced (P < 0.05), and it for N3 staging of gastric cancer was lower than that of CT enhanced (P < 0.05). From the analysis of M staging of gastric cancer, the PPRs of CEUS for M0 and M1 staging of gastric cancer were not statistically different from the PPRs of CT enhanced (P > 0.05). The sensitivity (95.6%), specificity (81.82%), and accuracy (94.12%) of CEUS in assessing resectability were significantly higher than those of CT enhancement (89.01%, 63.67%, and 86.27%, respectively), and the differences were statistically significant (P < 0.05). In summary, CEUS gastrointestinal filling based on the D-CNN algorithm could better improve the display rate of the tissue lesions around the stomach. It also helped to judge the lesion progress, the depth of infiltration, and lymph node metastasis of the lesion. In addition, it had excellent performance in evaluating the resectability of gastric cancer before surgery and had clinical promotion value.

Analysis of the Application Value of 64-slice Spiral CT Three-dimensional Imaging Technology in the Diagnosis of Colon Cancer

Analysis of the Application Value of 64-slice Spiral CT Three-dimensional Imaging Technology in the Diagnosis of Colon Cancer

Value of 64 Slice Spiral CT in Imaging Diagnosis of Pulmonary Sarcoidosis

Value of 64 Slice Spiral CT in Imaging Diagnosis of Pulmonary Sarcoidosis

Comparison of Clinical Diagnostic Value of 64-Slice Spiral CT Coronary Angiography and Coronary Angiography in the Diagnosis of Coronary Artery Stenosis

Comparison of Clinical Diagnostic Value of 64-Slice Spiral CT Coronary Angiography and Coronary Angiography in the Diagnosis of Coronary Artery Stenosis

Analysis of high-resolution reconstruction of medical images based on deep convolutional neural networks in lung cancer diagnostics

Background and objectiveTo study the diagnostic effect of 64-slice spiral CT and MRI high-resolution images based on deep convolutional neural networks(CNN) in lung cancer. MethodsIn this paper, we Select 74 patients with highly suspected lung cancer who were treated in our hospital from January 2017 to January 2021 as the research objects. The enhanced 64-slice spiral CT and MRI were used to detect and diagnose respectively, and the images and accuracy of CT diagnosis and MRI diagnosis were retrospectively analyzed. ResultsThe accuracy of CT diagnosis is 94.6% (70/74), and the accuracy of MRI diagnosis is 89.2% (66/74). CT examination has the advantages of non-invasive, convenient operation and fast examination. MRI is showing there are advantages in the relationship between the chest wall and the mediastinum, and the relationship between the lesion and the large blood vessels. ConclusionEnhanced CT and MRI examinations based on convolutional neural networks(CNN) to improve image clarity have high application value in the diagnosis of lung cancer patients, but the focus of performance is different.

The Application Value of Spiral CT Lung Densitometry Software in the Diagnosis of Radiation-Induced Lung Injury.

In order to study the application value of spiral CT lung density measurement software in the diagnosis of radioactive lung injury, the average CT values of lung apex, hilum, and diaphragm were measured by Pulmo automatic evaluation software of 16-slice spiral CT in 96 patients with different types of radiation lung injury diagnosed by conventional CT and 80 healthy subjects. The radiation lung injury on CT slices was classified, and the lung density was measured. In 96 patients with different types of radiation lung injury, 56 patients had different degrees of increase in average lung density, which was most obvious in the type of air insufficiency and chronic fibrosis. CT values of lung density in the ground glass stage and patch stage of acute radiation pneumonia had little influence due to the range and time of exposure. The lung density of 35 patients with radiation injury was measured in the normal range. There was a significant difference between normal lung density and abnormal lung density in different types of radiation lung injury (X2 = 56.718, P < 0.001). The mean lung density of 68 cases was normal and that of 12 cases was abnormal. There was a significant difference in lung density between the lung injury group and the normal group (X2 = 18.027, P < 0.001). Spiral CT lung density measurement can accurately evaluate the lung density values of different types of radiation lung injury and judge the correlation between lung density and different types of radiation lung injury. It is of great value to diagnose, locate, and master the radiation dose of different types of radiation lung injury.

Clinical Diagnosis of Pulmonary Embolism with 64 - slice Spiral CT

Clinical Diagnosis of Pulmonary Embolism with 64 - slice Spiral CT

Diagnostic Value of 64 Slice Spiral CT Combined Detection of Cd4 + Cd28-T Lymphocytes in Patients with Coronary Artery Plaque

in recent years, with the continuous progress and development of science and technology and the increasingly mature medical technology, the diagnosis of coronary artery plaque is becoming more and more complex. In recent years, there are many challenges and obstacles in the development of scientific and medical treatment. In order to successfully break through these challenges and obstacles, we must establish a 64- layer spiral CT detection system and lymphocyte symptom response. This paper mainly introduces the design and study of the diagnostic value of 64 slice spiral CT combined detection of CD4 + CD28-T lymphocytes in peripheral blood of patients with coronary plaque. This paper uses 64 slice spiral CT to detect the value of peripheral blood CD4 + CD28-T lymphocytes in the diagnosis of coronary plaque. The main purpose of CT is to solve two problems: the shape, size, location and activity of coronary plaque; The influence of coronary plaque on vascular anatomy and physiology plays a guiding role in treatment. The motion of coronary plaque and its relationship with heart cavity, heart wall and valve mouth (such as whether the movement of coronary plaque causes obstruction of valve mouth, etc.) can be displayed by film scanning, and cardiac function can be calculated. The results show that the diagnostic value of combined detection of CD4 + CD28-T lymphocytes in peripheral blood of patients with 64 slice spiral CT makes the plaque treatment rate increase by 16%. The limitations of the design of 64 slice spiral CT are analyzed the research and summary will enrich the academic research results.

Application of the Artificial Neural Network in the Diagnosis of Infantile Bronchial Bridge with 64-Slice Multislice Spiral CT.

The objective is to study the application of spiral CT in the diagnosis of the trachea in children. In this study, the effect of 64-slice multislice spiral CT in diagnosing infant bronchial bridge was studied based on an artificial neural network. From June 2020 to December 2020, 100 cases of children with the trachea in the outpatient department of our hospital were selected as the research object. They were divided into the study group and the control group, with 50 cases in each group. The results showed that among the 50 cases in the control group, 42 cases were found to have a bronchial foreign body and 8 cases were missed; the detection rate was 84%. There were 7 cases of trachea foreign body, 15 cases of left bronchial foreign body, 14 cases of right bronchial foreign body, and 6 cases of medium bronchial foreign body. The detection rate of the study group was significantly higher than that of the control group, with a statistical significance (P < 0.05). Conclusion. The detection rate of neural networks in MSCT is higher than that of X-ray, and the MSCT based on the artificial neural network can clearly show the morphology, position, and the relationship between the foreign body and trachea, which is worthy of clinical promotion and application.

The Clinical Value of 128-slice Spiral CT with Dual-phase HRCT in the Treatment of Small Airway Lesions

The Clinical Value of 128-slice Spiral CT with Dual-phase HRCT in the Treatment of Small Airway Lesions