摘要:目的:通过食管吞钡造影及造影后CT平扫检查提高梨状窝瘘的诊断率。方法:平卧位左、右、前、后斜位和头低足高位食管吞钡后透视观察有无钡剂外漏后,行CT平扫检查。扫描范围上起口咽部,下至胸骨上窝,层距厚3 mm。扫描后图像作多层面重建处理。结果:透视下见到瘘管3例,另3例经CT多层面重建隐约见到瘘管,但14例均可见漏出的钡剂滞留影,可判断瘘管的存在。结论:食管吞钡造影及造影后CT平扫可提高对梨状窝瘘诊断的敏感性和诊断率。Abstract: Objective: To improve the diagnosis rate of the pyriform sinus fistula by means of esphagogram and CT scan after esphagogram. Methods:To observe whether there is the leakage of barium by Xray check after barium swallowed in the five positions of body, followed by CT scan. The scanning ranges from oropharyngeal to Waterloo on sternum. The thickness is 3mm. The image is dealt with multidimensional reconstruction after the scan. Results:Among fourteen cases, the fistula can be seen in three, and be indistinctly seen after the multidimensional reconstruction of CT scan in the other three ones. All The fourteen cases show the trace of the leakage of barium, which helps to prove the existence of pyriform sinus fistula. Conclusions: Esphagogram and CT scan after esphagogram contribute the sensitivity of the diagnosis of pyriform sinus fistula, and improve the diagnosis rate.
ObjectiveTo explore the feasibility and safety of the artificial pneumoperitoneum and gastrointestinal contrast CT imaging, and imaging diagnostic value on abdominal wall adhesion to intestine after operation. MethodsThirtynine patients with adhesive intestinal obstruction after operation relieved by conservative therapy were included from January 2008 to November 2009. After the artificial pneumoperitoneum established by injection of gas into abdominal cavity and gastrointestinal comparison by oral administration low concentration of meglucamine diatrizoate, CT scan imaging was performed and the radiographic results were compared with surgical findings. ResultsFour patients refused surgery and discharged, so enterolysis was performed in the remaining patients. The surgical findings were consistent with radiographic results. It was showed by laparoscopic operation that intestinal obstruction caused by the fibrous adhesions and the intestine did not adhere to the abdominal wall in eight patients with fibrous adhesion diagnosed by CT. Of eighteen patients with the abdominal wall septally adhered to the intestinal, the surgical findings showed the intestine and the abdominal wall formed “M”type adhesions and omentum adhesions in sixteen patients underwent open operation, and clear fat space was showed in eight patients and close adhesion was found in another eight patients between the intestine and abdominal wall. Of thirteen patients with the abdominal wall tentiformly adhered to the intestinal, the surgical findings showed the intestine and the abdominal wall formed continuous and tentiform adhesions and omentum adhesions to the intestine in eleven patients. After the followup of 6-18 months (mean 9 months), incomplete intestinal obstruction occurred in one patient and was relieved by conservative treatment. One patient with discontinuous discomfort in abdomen after operation did not receive any treatment. The other patients were cured. ConclusionThe artificial pneumoperitoneum and gastrointestinal contrast CT imaging can accurately show the location, area, and structure composition of the postoperative abdominal wall adhesion to intestine, which is safety, simple, and bly repeatable, and a better imaging method for the diagnosing of abdominal wall adhesion to intestine after operation.
In this paper, we present a 3D virtual phantom design software, which was developed based on object-oriented programming methodology and dedicated to medical physics research. This software was named Magical Phantom (MPhantom), which is composed of 3D visual builder module and virtual CT scanner. The users can conveniently construct any complex 3D phantom, and then export the phantom as DICOM 3.0 CT images. MPhantom is a user-friendly and powerful software for 3D phantom configuration, and has passed the real scene's application test. MPhantom will accelerate the Monte Carlo simulation for dose calculation in radiation therapy and X ray imaging reconstruction algorithm research.
ObjectiveTo summarize the application of dual-energy CT scanning technology in the liver. MethodsTo search the relevant literatures at home and abroad, then the application of dual-energy CT scanning technology in focal liver lesions, diffuse liver lesions were analyzed and summarized. ResultsDual-energy CT scanning technology can improve detection rate of the focal liver lesions, liver cancer recurrence lesions after local treatment and help to differentiate focal liver lesions, to stage the malignant lesions, and it also can be more accurate quantification of liver iron, fat content, indirect measurement of hepatic blood flow dynamics change situation. ConclusionDual-energy CT scanning technology can improve the diagnostic value of CT scanning technology in liver disease.
Objective To investigate the feasibility of diagnosis of potential chronic obstructive pulmonary disease (COPD) patients who cannot finish the pulmonary function test via biphasic CT scan. Methods Sixty-seven male individuals aged 43 to 74 (57.0±5.9) years were divided into a COPD group (n=26) and a control group (n=41). All individuals underwent biphasic quantitative CT scan for calculating the proportion of emphysema, functional small airway disease, and normal component of the whole lung and each lobe. Results Based on principle component analysis, two principal components “imaging feature function 1 and imaging feature function 2” were calculated and analyzed by logistic regression, which found that imaging feature function 1 was an independent risk factor of COPD (odds ratio=8.749, P<0.001), and imaging features function 1 could be used to assist the diagnosis of COPD (area under receiver operating characteristic curve=0.843, P<0.001). Conclusion Imaging features function 1 is an independent risk factor for COPD and can assist the diagnosis of COPD.
ObjectiveTo explore the consistency and clinical application value of Balthazar CT classification and extra-pancreatic inflammation on computed tomography (EPIC) score in the diagnosis of acute pancreatitis (AP). MethodsA total of 100 continuous patients with AP were included in the Hainan Academy of Traditional Chinese Medicine from April 2019 to April 2021, who were divided into mild (n=41), moderate (n=37), and severe (n=22) AP, and all of them underwent the abdominal CT examination. The Balthazar CT classification score, EPIC score, and acute physiology and chronic health evaluation Ⅱ (APACHE-Ⅱ) score were compared and the correlations were analyzed among 3 groups. The consistency of Balthazar CT classification score or EPIC score and clinical classification was analyzed. ResultsThere were statistical differences in the Balthazar CT classification score [(1.58±0.29) points vs. (2.43±0.36) points vs. (3.20±0.51) points, F=13.261, P<0.001], EPIC score [(2.56±0.30) points vs. (4.29±0.77) points vs. (5.68±0.82) points, F=14.672, P<0.001], and APACHE-Ⅱ score [(21.40±6.22) points vs. (29.13±7.31) points vs. (39.37±8.18) points, F=13.906, P<0.001] among mild, moderate, and severe 3 groups. The points of the three indexes increased statistically with the severity of AP (P<0.05). The Balthazar CT classification score was positively correlated with APACHE-Ⅱ score and EPIC score (r=0.537, P<0.001; r=0.609, P<0.001), and EPIC score was positively correlated with APACHE-Ⅱ score (r=0.582, P<0.001). The Kappa values of Balthazar CT classification score or EPIC score and clinical classification for assessing the severity of AP were 0.731 and 0.704, respectively. ConclusionsFrom the preliminary results of this study, Balthazar CT classification score and EPIC score increase obviously with the aggravation of AP and which has a higher consistency, and are positively correlated with APACHE-Ⅱ score. It is suggested that abdominal CT has a good clinical application value in the assessment of severity of AP.