MSCT Images Research Articles

Preliminary study on AI-assisted diagnosis of bone remodeling in chronic maxillary sinusitis

ObjectiveTo construct the deep learning convolution neural network (CNN) model and machine learning support vector machine (SVM) model of bone remodeling of chronic maxillary sinusitis (CMS) based on CT image data to improve the accuracy of image diagnosis.MethodsMaxillary sinus CT data of 1000 samples in 500 patients from January 2018 to December 2021 in our hospital was collected. The first part is the establishment and testing of chronic maxillary sinusitis detection model by 461 images. The second part is the establishment and testing of the detection model of chronic maxillary sinusitis with bone remodeling by 802 images. The sensitivity, specificity and accuracy and area under the curve (AUC) value of the test set were recorded, respectively.ResultsPreliminary application results of CT based AI in the diagnosis of chronic maxillary sinusitis and bone remodeling. The sensitivity, specificity and accuracy of the test set of 93 samples of CMS, were 0.9796, 0.8636 and 0.9247, respectively. Simultaneously, the value of AUC was 0.94. And the sensitivity, specificity and accuracy of the test set of 161 samples of CMS with bone remodeling were 0.7353, 0.9685 and 0.9193, respectively. Simultaneously, the value of AUC was 0.89.ConclusionIt is feasible to use artificial intelligence research methods such as deep learning and machine learning to automatically identify CMS and bone remodeling in MSCT images of paranasal sinuses, which is helpful to standardize imaging diagnosis and meet the needs of clinical application.

Optimized early recurrence score for distal cholangiocarcinoma: A new attempt by adding imaging indicators

PurposeTo improve the preoperative prediction efficacy for patients with risk for early recurrence (ER) of distal cholangiocarcinoma (DCC). Methods56 patients pathologically diagnosed as DCC were included. Their clinical data and preoperative upper abdominal enhanced MSCT images were retrospectively reviewed to look for risk factors associated with ER. ER scores were calculated by Distal Cholangiocarcinoma Early Recurrence (DICER) score and optimized ER score (OERS). Chi-square test or Mann-Whitney U test was used to compare the differences between ER group and Non-ER group, DICER score and OERS, and TNM stage and OERS. Binary logistic regression analyses were performed to identify risk factors of ER. ResultsOf 56 DCC patients, 15 (26.8 %) experienced ER who were classified as ER group. Patients in ER group had significantly higher percentage of soft tissue around superior mesenteric artery (STASMA), positive lymph node, microvascular invasion and TNM stage III than those in Non-ER group, among which STASMA and positive lymph node were found to be independent risk factors for ER of DCC (All P values < 0.050). DICER score was optimized by adding STASMA and positive lymph node score to form OERS. OERS predicted more accurately than DICER score in low- and high-risk patients for ER of DCC (30.0 % vs. 0 %, 50.0 % vs. 75.0 %, P < 0.001). ConclusionsBy adding preoperative imaging indicators, OERS could improve the predictive efficacy for ER of DCC.

Visceral and Ectopic Abdominal Fat Effect on the Calcification of the Abdominal Aorta and Its Branches-An MSCT Study.

Visceral and ectopic fat accumulation might have an impact on the atherosclerotic calcification of abdominal arteries. The pattern of calcification of the abdominal aorta and its branches is not fully investigated. We retrospectively analyzed the abdominopelvic MSCT images and calculated calcification volumes of the abdominal aorta, celiac trunk, superior and inferior mesenteric arteries, and both common and external iliac arteries. On the same MSCT scans, a visceral fat volume and ectopic fat deposits (liver-to-spleen ratio (L/S) and pancreas-to-spleen (P/S) ratio) were also measured. The results showed that calcifications of the abdominal aorta and its branches were associated with visceral fat volume, less strongly associated with L/S, and not associated with the P/S ratio. The abdominal aorta, the common iliac and external iliac arteries were more calcified arteries compared to the celiac trunk and superior and mesenterial arteries. In conclusion, visceral fat has a stronger effect on abdominopelvic arteries' calcification than ectopic fat. Visceral aortic branches are generally less calcified than iliac arteries.

Analysis of Window Width Variations on MSCT Stonegraphy Anatomic Image Information at Sanjiwani Hospital of Gianyar Regency

Parameters in MSCT can affect image contrast and brightness are values of Window width and window level. window width will affect the contrast of the image. where the higher the value of window width used, the image contrast will decrease, where is the selection of the value of window width which can improve the quality of MSCT images and provide better diagnostic information. The purpose of this research is to determine the effect of window width variation on anatomy image information and determine the most optimal window width value MSCT Stonegraphy examination. This research is a quantitative with an experimental approach. The data obtained was then analyzed by kappa test to assess the reliability of the respondents, from the results of the respondents then the statistical test used was the Friedman test. Statistical test results p value &lt;0.05. This research has the effect of changing values window width. anatomical image information with value of window width 250 showed optimal results for assessing the urinary tract on Stonegraphy MSCT. In this study there is the effect of variation window width significant to the Stonegraphic MSCT anatomical image information.

MSCT findings of primary Pulmonary mucoepidermoid carcinoma

Objectives To improve diagnostic accuracy of pulmonary mucoepidermoid carcinoma (PMEC) through multi-detector computed tomography (MSCT) findings. Methods MSCT findings of 27 histopathologically confirmed PMEC cases were retrospectively analyzed, including the location, size, margin, density, enhancement of the lesion and accompanying signs. Results Among the 27 PMEC cases, 6 (6/27, 22.2%) were the large airway pattern, 14 were (14/27, 51.9%) the pulmonary hilum pattern, and 7 (7/27, 26.9%) were the peripheral pattern. Among those 20 cases with central pattern(6 large airway and 14 pulmonary hilum patterns), 6 presented mild enhancement, 4 moderate enhancement, 5 severe enhancement, 5 heterogeneous enhancement, and 3 with calcification. 7 cases with peripheral patterns were presented as solid pulmonary nodules and masses, 3 with severe enhancement, 1 with moderate enhancement and 3 with mild enhancement. Four cases accompanied by lymph nodal metastasis, and 7 cases with distant organ metastasis. Age(t = –3.132, p = 0.005), enlarged lymph node (x2 = 9.281, p = 0.005), and distant metastasis(x2 = 7.816, p = 0.008) were statistically significant in the low-grade group and high-grade group. Conclusions MSCT images of PMEC patients demonstrated some characteristic findings, which would help improve the diagnostic accuracy of the disease.

THE ROLE OF HIGH-RESOLUTION MSCT IN THE DIAGNOSIS OF OSSICULAR CHAIN DISORDER TYMPANOSCLEROSIS

To review the effectiveness of high-resolution computed tomography in making a diagnosis of tympanosclerosis and its reliability in predicting the postoperative period based on the result of hearing restoration, also based on radiological and surgical data. Methods: A retrospective survey was conducted in diagnostic and treatment institutions, and tympanoplasty was performed for chronic suppurative otitis media (CSOM) 200 ear. In March 2020 and 2021 of the same month, preoperative MSCT images of the temporal bone were reviewed, to verify the prognosis of tympanosclerosis and the integrity of the auditory ossicles. The integrity of the ossicular chain was checked both preoperatively and postoperatively using audiometry (air-bone conduction (ABG)) and the results were assessed: postoperative successful outcome was a tone frequency and sound volume level of 20 dB or less. Results: The study was conducted on 200 ears that underwent tympanoplasty for CSOM, of which 130 out of 200(49%) ears had tympanosclerosis localized in the eardrum, discovered during surgery (tympanoplasty), ears were affected in 41 out of 130 (30, 1%), Incus-malleus ossicular ligament disorders occurred in 19 of 41 ears. 11 ears with a disorder of the stapes bone, and 6 with a disorder of the connection of all three bones. In the remaining 70 cases, a scan of the temporal bone revealed the integrity of all hearing bones and their conductivity. After 6 months, during repeated observation of patients, audiological results of fixation with sensitivity were obtained (95.1%) and specificity (93.8%). Conclusions: Based on the conducted research, it is possible to draw the following conclusion: for otolaryngologists, MSCT in combination with clinical data serves to effectively assess the extent of the lesion, as well as inform for the postoperative prognosis for tympanosclerosis.

Informasi Anatomi dan Dosis Radiasi pada MSCT Brain Pediatric Menggunakan Adaptive Statistical Iterative Reconstruction (ASiR)-V

Background: Multislice CT Scan (MSCT) brain examination in pediatric cases should pay attention to the lowest possible dose but still provide optimal anatomical information. Pediatric has a higher risk of developing cancer compared to adults who receive the same dose. The purpose of this study is to obtain the optimal value of the use of the Adaptive Statistical Iterative Reconstruction (ASIR)-V technique with variations in tube current strength and Iterative Reconstruction value which is implemented in pediatric patients under the age of 5 (five) years. Methods: This research was experimental with brain image samples of pediatric patients at the Radiology Installation of RSUD dr. Moewardi Surakarta. The variations of the tube currents selected were 80, 100, and 165 mA with a combination of AR20, AR40, AR60, and AR80 variations. Anatomical information processed descriptively sourced from the assessment of 3 (three) radiologists who were experienced in assessing MSCT images. Meanwhile, the effect of tube current variation on radiation dose was tested using linear regression. Results: The results showed differences in anatomical information between the combinations of 165 mA-AR60 and 165 mA-AR80 "very clear", 165 mA-AR20 "clear", 80 mA-AR20 "fairly clear" and 100 mA-AR80 "less clear". There was an effect of strong variation of tube current on radiation dose with a regression coefficient value of 0.690. The estimated effective doses of the three tube current values were still below the national Dose Reference Level (DRL). Conclusions: It was concluded that there were differences in anatomical information on the MSCT brain pediatric examination with variations in tube current and ASiR-V, there was an effect of variations in mA on radiation dose and mA values and the optimal value of the combination of techniques studied is 80 mA and 20% Iterative Reconstruction.

The use of Green Bean Juice as an Effort to Improve MSCT Image in Abdomen MSCT Protocol (in Vitro Study)

Oral contrast media usually used in abdominal MSCT examinations are water and contrast media containing iodine. However, there are advantages and disadvantages, so an alternative replacement for natural ingredients is needed, namely green bean juice. This study aims to prove that using mung bean extract can improve MSCT images for oral contrast media in the MSCT Abdomen protocol based on in vitro studies. The research method used was a quasi-experimental study to compare the extent to which mung bean extract improved MSCT images compared to water and contrast media containing iodine as oral contrast media in the Abdomen MSCT protocol based on in vitro studies. Measurement of image enhancement is done by measuring ROI. Furthermore, the measurement results were analyzed using the difference test and a follow-up test, namely the Least Significance Difference (LSD) test. The research results show that green bean juice can improve abdominal MSCT images to be used as an oral contrast medium in the Abdominal MSCT protocol based on in vitro studies. Then, there was a difference in improving the MSCT image when using green bean juice, water, and contrast media containing iodine as oral contrast media in the abdominal MSCT protocol based on in vitro studies, and it was found that there was a difference in the concentration of green bean juice in getting optimal results in the MSCT protocol. Abdomen based on in vitro studies. Conclusion Mung bean extract can be used as an oral contrast medium instead of water because it can improve MSCT images.

OPTIMALISASI KUALITAS CITRA ANATOMI DENGAN VARIASI IDOSE DAN INTERATIVE MODEL RECONTRUCTION (IMR) PADA MSCT UROGRAPHY NON KONTRAS DENGAN TEKNIK TRACKING

Background: The urinary tract (urinary system) consists of the two kidneys and ureters, the urinary bladder, and the ureters. There are several ways to examine abnormalities in the urinary tract radiologically. including the current CT scan, CT Scan (MSCT) is one of the modalities to evaluate and diagnose urinary tract disorders. MSCT of the urinary tract without using positive contrast media is able to identify images of the urinary tract in cases of urolithiasis. iDose and Interative Model Reconstruction (IMR) are the second generation of IR algorithms from the previous generation, namely iDose. This technology can also lower the dose to the patient and also improve the quality of the resulting image.&#x0D; Method: This type of research is an experiment with an observational approach with comparisons. This type of research is an experiment with data obtained from a comparison of noise values and the quality of anatomical images from tracking images with iDose and IMR variations. And an assessment was carried out by 3 radiologists. Place of data collection in radiology RSUD RAA Soewondo Pati. Time for data collection From April to November 2022. in assessing anatomical images using statistical tests. Data analysis was carried out using the Wilcoxon statistical test method because the data were ordinal with paired groups. The Wilcoxon statistical test was used to test the hypothesis and see the level of difference in anatomical image information. The level of significance (level of significance) is 95% or α&gt; 0.05 and is done by assessing the p-value. For a significant level of assessment p &lt;0.05 then Ho is rejected and p&gt; 0.05 then Ho is accepted.&#x0D; Results: Friedman test on each anatomical part of the urinary tract system on Non-Contrast Urography MSCT images with Tracking Techniques with iDose 1-6 and IMR 1-3 variations, there are differences in anatomical image information with a p value of .000 (p &lt;0.05). In the anatomy of the renal parenchyma, the highest mean rank is iDose 3 with a value of 8.15. In pelvic anatomy and kidney calices, the highest mean rank is at iDose 6 with a value of 8.05. In ureteral anatomy, the highest mean rank is iDose 3 with a value of 8.05. In the anatomy of the perirenal space, the highest mean rank is iDose 3 with a value of 8.20. Based on the results of the mean rank Friedman test to find out the optimal I Dose and IMR values, it was obtained iDose 1 with a mean rank value of 4.65, iDose 2 with a mean rank value of 4.95, iDose 3 with a mean rank value of 8.3, iDose 4 with a mean rank value of mean rank 6.4, iDose 5 with a mean rank value of 6.55, iDose 6 with a mean rank value of 7.75, IMR 1 with a mean rank value of 1.65, IMR 2 with a mean rank value of 2.05, and IMR 3 with a mean value rating 2.7.&#x0D; Conclusion: Changes in the values of iDose and IMR variations affect the anatomical image information of Non-Contrast MSCT Urography with Tracking Techniques, this is based on the results of the mean rank Friedman test performed on each anatomy of the renal parenchyma, pelvic calices, ureters and perirenal space which shows a difference. Based on the results of Friedman's mean rank test conducted on the entire anatomy of the renal parenchyma, ureters, and perirenal space, it showed that the optimal iDose and IMR variation values were iDose 3 with a mean rank value of 8.3.

ANALISIS KUALITAS CITRA ANATOMI MSCT UROGRAPHY DENGAN VARIASI INTERATIVE MODEL RECONTRUCTION (IMR)

Background: The urinary system consists of two kidneys and ureters, urinary bladder, and urethra. Various modalities in radiology can be used to radiologically detect abnormalities in the urinary system, one of which is MSCT. MSCT Urography with tracking technique can identify urolithiasis in the ureters. Iterative reconstruction is used to reduce the dose received by the patient without reducing image quality. Iterative Model Reconstruction (IMR) is the second-generation IR algorithm from the previous generation, namely iDose (Philips Healthcare). This study aims to determine the optimal anatomy image quality with IMR variations on non-contra Urography MSCT images using tracking techniques.&#x0D; Methods: This type of research is an experiment with data obtained from a comparison of the quality of anatomical images from tracking images with IMR variations. Place of data collection at the Radiology Installation of RSUD RAA Soewondo Pati. Time for data collection From 2022. An assessment of the quality of the anatomical images was carried out by 2 radiologists. Data analysis was carried out using the Friedman statistical test method. The level of significance (level of significance) is 95% or α&gt; 0.05 and is done by assessing the p-value. For a significant level of assessment p &lt;0.05 then Ho is rejected and p&gt; 0.05 then Ho is accepted.&#x0D; Results: There are differences in information on each anatomy of the renal parenchyma, pelvic calices, ureters, and perirenal space in the use of IMR variations. The results showed that the optimal IMR variation value was IMR 3 with a mean rank value of 2.7. Increasing the use of IMR levels reduces noise and increases spatial resolution, so that IMR level 3 has the best assessment of anatomical information.&#x0D; Conclusions: We recommend that the non-contrast MSCT Urography examination with the Tracking Technique use IMR 3 which can produce optimal anatomical image information on the kidney parenchyma, pelvic calices, ureters, and perirenal space.

Colovesical fistula in a patient with diverticular disease and foreign body of the colonj

A clinical observation of a 50-year-old patient with colonic diverticular disease with perforation of one diverticulum by a fish bone and the formation of a colovesical fistula is presented in the article. The history of the disease, clinical picture, the course of the disease, results of pre-hospital and hospital examination, methods of treatment of the patient were analyzed. The presented material is illustrated by MSCT images, photographs made during the surgical treatment, results of histological examination. Surgical treatment included lower midline laparotomy, resection of the sigmoid colon and bladder with complete removal of the fistula with a diverticulum and bone inside it as a single block, formation of a colostomy, suturing the bladder defect tightly with urethral drainage with a Foley catheter. There were no complications during the operation and in the early postoperative period, the patient was discharged at the usual time. At a later date, a reconstructive operation was performed with the restoration of the passage of intestinal contents, without complications. A review of the literature on the diagnosis and treatment of patients with colovesical fistulas is presented.

Primary Preparation of Data for the Analysis of Brain MSCT Images for the Task of Searching for Primary Signs of a Brain Stroke

Primary Preparation of Data for the Analysis of Brain MSCT Images for the Task of Searching for Primary Signs of a Brain Stroke

The repeatability of standard cranial measurements on dry bones and MSCT images.

This study examined if the cranial measurements from Data Collection Procedures for Forensic Skeletal Material 2.0 are repeatable when measured in dry bones and MSCT images and if the virtual measurements correspond to the physical ones. The sample included 33 dry crania imaged by MSCT. Two observers measured dry bones, two placed landmarks on 2D and 3D MSCT reconstructions, and one conducted measurements/landmarking on both media. One of the observers for each media repeated the measurements. Technical and relative technical error of measurement (TEM and rTEM) and percentage differences were calculated to examine the repeatability of measurements and compare measuring modalities. Intraobserver rTEM was above 1.5% for six bone measurements: FOB, ZOB, OBB, NLH, DKB, MDH (1.51%-4.87%) and for seven MSCT measurements: OBH, FOB, OBB, MDH, NLB, ZOB, DKB (1.57%-5.55%). The interobserver rTEM was above the acceptable level (>2%) for 11 measurements: PAC, NLH, OBB, EKB, MAL, FOB, NLB, OBH, ZOB, DKB, and MDH (2.01%-9.34%). The percentage differences were not systematically larger for measurements taken by the same user on both modalities than those obtained by different users on the same modality. When physical and MSCT measurements were tested on sex classification standards, the proportion of crania classified as male or female did not significantly differ (p > 0.05). The study showed that physical and virtual cranial measurements could be interchangeable for developing or applying sex estimation standards. However, clarifications and adaptations are necessary for measurements of mastoid, nasal, and orbital regions that did not meet the standard criteria.

Abstract P-32: Lung Structural Changes in Covid-19 Patients

Background: The main causes of death from Covid-19 are lung lesions with the development of respiratory failure. However, structural changes in the lung tissue in this pathology are poorly studied. We examined autopsy material from patients with Covid-19. The severe condition of patients, the manifestation of pulmonary symptoms of damage (cough, dyspnea) and the high probability of viral pneumonia at COVID-19 led to the widespread use of CT diagnostics in this group of patients, which allowed to identify of the primary signs of the disease, their subsequent transformation as well as the most adverse radiation symptoms corresponding to the severe course of the process (Speranskaya, 2020; Pan et al., 2019). In the cases studied by us, the detection of typical symptoms revealed by radiation diagnostics of COVID-19 was subsequently confirmed by PCR data, which may indicate a high information content and specificity of detecting CT symptoms of a lesion as a method of primary diagnostics. The aim of our study is to confirm at the microscopic level the correspondence of MSCT changes. Methods: The material was taken at autopsy of deceased patients, fixed in 10% formalin solution in phosphate buffer, paraffin sections were stained with hematoxylin and eosin. The autopsy material was examined using a Carl Zeiss light microscope, Axioskop 40. Results: Studies have shown that most of the alveoli of the lung tissue kept their airiness. However, their lumens were significantly reduced due to a significant thickening of the interalveolar septa caused by pronounced inflammatory infiltration mainly by lymphocytes. The most significant changes were revealed from the side of the microvasculature. There are numerous blood clots of various sizes in the lumen of most micro-vessels. The walls of microvessels have been significantly thickened with pronounced inflammatory infiltration and significant edema. The lumens of microvessels have been characterized by significant polymorphism. Intraluminal clots have been also characterized by pronounced polymorphism. The parietal pleura has been thickened. This has been reflected in the MSCT images and corresponds to the processes of perivascular infiltration. Conclusion: The primary CT pattern of COVID-19 is a picture of infiltration of individual secondary pulmonary lobules of the "ground glass" type, followed by a decrease in the lesion volume at a favorable course of the disease, or their increase, the addition of a CT picture of a "cobblestone pavement" and the appearance of alveolar infiltration in the area of "ground glass" at the unfavorable course of the disease.

Preoperative Staging Diagnosis of Colorectal Cancer Based on Multi-Row Spiral CT

Colorectal cancer is a common malignant tumor of digestive tract, and its incidence has increased significantly in recent years. The 5-year survival rate of patients with early local colorectal cancer is more than 90%, with local invasion of about 68%, and distant metastasis of less than 10%. Therefore, early diagnosis and early treatment is an effective means for the prevention and treatment of colorectal cancer. At present, X-ray air-barium double contrast radiography and fiberoptic endoscope are most commonly used in the examination of colorectal tumors in the world. These two methods have the advantages of simple operation, intuition and low cost. However, it is limited to judge the depth of tumor invasion, whether to break through the serosa, lymphatic metastasis, and distant metastasis. In this work, it can be confirmed that the measurement of preoperative tumor vascular volume reconstruction density is feasible in the preoperative evaluation of colorectal cancer, it will provide clinicians with more valuable information about preoperative tumor staging. Besides, multi-slice spiral CT has the advantages of less trauma, high speed, and clear image. It can not only judge the location of the tumor, the depth, and extent of tumor invasion, and show distant organ metastasis, but also has good application value in tumor staging. In this paper, the clinical data and MSCT imaging data of patients with colorectal cancer were analyzed retrospectively, and the value of MSCT in the diagnosis of colorectal cancer was discussed.

The features of computed tomography and digital subtraction angiography images of ruptured cerebral arteriovenous malformation

Objectives This study aims to analyze lesions on computed tomography (CT) images and digital subtraction angiography (DSA) of ruptured cerebral arteriovenous malformation (AVM). Methods Cross-sectional description of 82 patients' cerebral bleeding due to rupture of AVM, determined by multislice computed tomography or cerebral DSA at Bach Mai Hospital. Results Patients with ruptured AVM are commonly under 40 years old (62.2%), average age: 35.1 ± 11.2. On CT or DSA images, it is common to see AVM rupture causing cerebral bleeding in the supratentorial region (91.5%), with 83% cerebral lobe bleeding, mainly small and moderate hematoma volume ( p p Conclusions On MSCT and DSA images, ruptured AVMs often cause lobar hemorrhage in young people. AVMs are usually small to moderate in size. The feeding arteries are mainly derived from middle and posterior cerebral arteries, and drained mainly by superficial veins. The Spetzler–Martin classification and the supplementary grading scales are used for ranking the severity of the lesion, as well as for choosing AVM treatment options and assessing the prognosis.

Semi-automated detection of aortic root in human heart MSCT images using nonlinear filtering and unsupervised clustering

A semiautomatic technique to detect the aortic root in three-dimensional multi-slice computerised tomography images is proposed. Three steps are considered: conditioning, filtering, and detection. The conditioning is based on multi-planar reconstruction and it is required for reformatting the information to orthogonal planes to the aortic root. During the filtering, three nonlinear filters based on similarity enhancement, median and weighted median are considered to reduce noise and enhance the reformatted images. In the detection, the filtered volumes are processed with a clustering technique. Dice score, the point-to-mesh and the Hausdorff distances are used to compare the obtained results with respect to ground truth traced by a cardiologist. A clinical dataset of 90 volumes from 45 patients is used to validate the technique. The maximum Dice score (0.92), the minimum average point-to-mesh distance (0.96 mm) and the minimum average Hausdorff distance (4.80 mm) are obtained during preprocessed volumes segmentation using similarity enhancement.

Semi-automated detection of aortic root in human heart MSCT images using nonlinear filtering and unsupervised clustering

A semiautomatic technique to detect the aortic root in three-dimensional multi-slice computerised tomography images is proposed. Three steps are considered: conditioning, filtering, and detection. The conditioning is based on multi-planar reconstruction and it is required for reformatting the information to orthogonal planes to the aortic root. During the filtering, three nonlinear filters based on similarity enhancement, median and weighted median are considered to reduce noise and enhance the reformatted images. In the detection, the filtered volumes are processed with a clustering technique. Dice score, the point-to-mesh and the Hausdorff distances are used to compare the obtained results with respect to ground truth traced by a cardiologist. A clinical dataset of 90 volumes from 45 patients is used to validate the technique. The maximum Dice score (0.92), the minimum average point-to-mesh distance (0.96 mm) and the minimum average Hausdorff distance (4.80 mm) are obtained during preprocessed volumes segmentation using similarity enhancement.

Effects of 3D Imaging on Surgical Tactics in Primary and Revision Hip Arthroplasty

3D imaging tools significantly expand the ability to assess the bone tissue condition, both in terms of its qualitative properties and in terms of accurate determination of bone defect geometry and volume.The purpose of the study was to determine the 3D imaging potential for the preoperative planning and correction of surgical tactics in hip arthroplasty.Materials and Methods. A retrospective analysis of the preoperative planning of 110 primary and revision hip arthroplasties with 3D imaging was performed. The following specialized software were employed: RadiAnt DICOM Viewer file converter — for 3D models production; 3D/CAD designers — for volumetric models processing and correction; InVesalius 3.0 program — for bone density evaluation by the Hounsfield scale; K-Pacs — for viewing MSCT and X-ray images. All patients underwent pelvic bones radiography in the front and anterior-lateral planes. Post-traumatic acetabular deformity was described in accordance with the X-ray picture in each individual clinical case. For revision arthroplasty, the acetabular defect was determined according to the W.G. Paprosky classification. In 36 patients (32.7%), the acetabulum defect was the result of trauma. In 74 patients (67.3%), the cause of surgery was endoprosthesis components loosening.Results. In 80% of cases (88 patients), the analysis of the 3D model did not change the surgical tactics determined in the preoperative planning using pelvic radiographs; in 20% of cases (22 patients), the use of 3D imaging revealed new circumstances and changed the surgical tactics.Conclusion. In standard cases, it is possible to use the traditional preoperative planning using radiographs in several planes. In primary hip arthroplasty in the patients with post-traumatic deformity, including a false joint of acetabulum bottom or 2 to 3 degree osteopenia, it is advisable to perform 3D imaging. In the case of revision arthroplasty, 3D visualization is indicated in acetabulum Paprosky IIIA, IIIB defects with pelvic discontinuity.

Analysis of correlation between MSCT classification and prognosis of basal ganglia hypertensive intracerebral hemorrhage

Objective: To investigate the correlation between MSCT grading and the prognosis of basal ganglia hypertensive intracerebral hemorrhage.Methods: A total of 86 patients with basal ganglia hypertensive cerebral hemorrhage admitted to our hospital from May 2017 to March 2018 were selected. The clinical data and imaging data were collected from 86 patients. The MSCT images were observed and summarized by two radiologists. Based on the morphology of cisterna ambiens and brain stem, the correlation of MSCT grading to Glasgow Coma Scale (GCS) and Glasgow Outcome Scale (GOS) grading was analyzed by use of Spearman correlation analysis.Results: Among 86 patients, the number of MSCT grade I, II, III and IV were 29 cases, 38 cases, 9 cases and 10 cases respectively. There was no significant correlation between MSCT grading and age, sex as well as types of combined underlying diseases in the patients with basal ganglia hypertensive intracerebral hemorrhage (p &gt; .05). Spearman correlation analysis showed that there was a positive correlation between MSCT grading and GCS score of basal ganglia hypertensive intracerebral hemorrhage. The higher MSCT grade was, the higher GCS score was (r = .719, p &lt; .001). There was a positive correlation between MSCT grading and GOS grading of basal ganglia hypertensive intracerebral hemorrhage. The higher MSCT grade was, the higher GOS grade was, leading to a poor prognosis (r = .734, p &lt; .001). 86 cases of basal ganglia hypertensive intracerebral hemorrhage showed round or quasi-circular high-density shadows in MSCT images, the CT value ranged from 50 Hu to 80 Hu. Low-density bands surrounded the hematoma in the acute stage, and space-occupying effect could be seen in some patients, which resulted in the compression of ventricular sulcus and cistern and the displacement of midline structure. Subacute basal ganglia hypertensive intracerebral hemorrhage patients showed a relative decrease in the density of hematoma, with the extent of edema gradually reduced, the focus showed a high-density shadow in the center; chronic basal ganglia hypertensive intracerebral hemorrhage focus showed a cystic low-density shadow.Conclusion: MSCT grading of basal ganglia hypertensive intracerebral hemorrhage is positively correlated to GCS and GOS grading. MSCT grading can contribute to the prognostic evaluation to the patients.