scholarly journals Capabilities of perfusion computed tomography in colorectal cancer detection and differential diagnosis of pathological conditions of the colon. Early results

2020 ◽  
Vol 11 (4) ◽  
pp. 19-26
Author(s):  
Maksim Yu. Kabanov ◽  
Irina K. Borovik ◽  
Mariya Ya. Belikova ◽  
Konstantin V. Sementsov ◽  
Irina E. Itskovich ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Computed Tomography ◽  
Cancer Detection ◽  
Ct Perfusion ◽  
Perfusion Technique ◽  
Perfusion Computed Tomography ◽  
Pathological Conditions ◽  
Early Results ◽  
Preoperative Ct ◽  
Inflammatory Bowel

The article presents the results of preoperative CT diagnostics of colorectal cancer using perfusion technique. It was found that CT perfusion can improve the diagnostics of local prevalence of colon cancer compared to standard computed tomography, as well as to differentiate colorectal cancer and inflammatory bowel disease.

scholarly journals Assessment of the Clinical Usefulness of Preoperative Computed Tomography in Colorectal Cancer Patients Who Received Unplanned Reoperation

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Rui Wang ◽  
Yi Gao ◽  
Jia-Yi Li ◽  
Zhong-Hui Wang ◽  
Qin-qing Li ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Computed Tomography ◽  
Postoperative Complications ◽  
Cancer Patients ◽  
Ct Imaging ◽  
Preoperative Imaging ◽  
Imaging Evaluation ◽  
Preoperative Ct ◽  
Colorectal Cancer Patients ◽  
Statistical Indicators

Background. In the unplanned reoperation of colorectal cancer patients, computed tomography (CT) is increasingly utilized to locate postoperative complications and previously unlocalized lesions. The purpose of this study is to explore the application of CT in the mortality and complications of the reoperation of colorectal cancer. Patients and Methods. We performed a retrospective review of collected data from the colorectal surgeries of 90 identified colorectal cancer patients who received an unplanned reoperation from 2010 to 2018. Patients were stratified according to those with preoperative CT imaging (CT group, n=36) and those without preoperative CT imaging (NCT group, n=54). Twenty-four statistical indicators of each patient were studied, including their preoperative risk, surgical characteristics, and postoperative outcomes, and satisfaction was evaluated. All data were statistically analysed for predicting postoperative complications by univariate and multivariate logistic regression analyses. Results. Ninety patients received an unplanned reoperation in the study, and 40% (36/90) of these patients underwent preoperative CT examination. Patients’ risk factors were similar between CT and NCT groups. Preoperative imaging was more commonly performed for reoperative new anastomosis + ileostomy but less common for reoperative Dixon’s procedure. The operative duration of the NCT group was longer (139 vs. 104 min, respectively, P=0.01). Preoperative NCT examination (OR 1.24; 95% CI=1.09‐1.42; P=0.01) was an independent predictor of postoperative complications. Importantly, three patients died after an unplanned reoperation for colorectal cancer, which occurred only in the NCT group (5.6% vs. 0.0%, P=0.01). Conclusion. The use of conventional preoperative CT optimizes the choice of the surgical site and the strategy of laparotomy, so as to reduce the length of operation. Preoperative imaging evaluation should be performed for patients undergoing repeat abdominal surgery.

The feasibility of colorectal cancer detection using dual-energy computed tomography with iodine mapping

2013 ◽  
Vol 68 (8) ◽  
pp. 799-806 ◽  
Author(s):  
T.N. Boellaard ◽  
O.D.F. Henneman ◽  
G.J. Streekstra ◽  
H.W. Venema ◽  
C.Y. Nio ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Computed Tomography ◽  
Cancer Detection ◽  
Dual Energy ◽  
Dual Energy Computed Tomography

The Accuracy of Colorectal Cancer Detection by Computed Tomography in the Unprepared Large Bowel in a Community-Based Hospital

2018 ◽  
Vol 69 (1) ◽  
pp. 92-96 ◽  
Author(s):  
Suneet Mangat ◽  
Michael G. Kozoriz ◽  
Simon Bicknell ◽  
Audrey Spielmann
Keyword(s):  
Colorectal Cancer ◽  
Computed Tomography ◽  
Cancer Detection ◽  
Large Bowel ◽  
Wall Thickening ◽  
Oral Contrast ◽  
Community Based ◽  
Emergency Presentation ◽  
Bowel Wall Thickening ◽  
High Degree

Purpose This retrospective study examined the performance of general radiologists in a community-based hospital in detecting colorectal cancer (CRC) with computed tomography (CT) in the unprepared large bowel. Methods The pathology database at a community hospital over the past 7 years (2009–2015) was retrospectively analysed for pathologically proven CRC (924 cases). The provincial hospital information profile for these patients was reviewed to determine if they had an abdominal CT for any reason in the year prior to biopsy. Metrics such as age, sex, time between the CT and biopsy or surgery, whether CRC was initially detected by the radiologist, and if this was an emergency presentation was evaluated. In the cases where CRC was not identified, the CT scans were reanalysed to determine if the CRC was identifiable in retrospect. The sensitivity of detecting CRC by CT scan in the unprepared large bowel was calculated. Results Of the 924 biopsy proven CRC cases, 22% (207 of 924) of the patients had a CT prior to biopsy. Of these cases, 47% (97 of 207) presented on an emergency basis. Of the cases with imaging in the year prior, about 60% (125 of 207) had cancer prospectively detected by the radiologist. Upon re-examination of the cases in which CRC was not initially detected, 59% were visualized in retrospect. Conclusions Community general radiologists can successfully detect CRC with a high degree of accuracy. Reformatted images, bowel wall thickening when regional nodes are prominent, and minimizing oral contrast were helpful in improving detection.

scholarly journals Information technology for the analysis of CT perfusion in assessing the effectiveness of treatment for glioblastoma

2020 ◽  
Vol 7 (3) ◽  
pp. 83-90
Author(s):  
A. V. Balandina ◽  
P. M. Zelter ◽  
A. V. Kapishnikov ◽  
S. V. Kozlov ◽  
A. V. Kolsanov ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Information Technology ◽  
Diagnostic Method ◽  
Radiation Necrosis ◽  
Ct Perfusion ◽  
Perfusion Computed Tomography ◽  
Equipment Manufacturer ◽  
Post Radiation ◽  
Computed Tomograph ◽  
Perfusion Mode

Purpose of the study. To develop an information technology for calculating perfusion computed tomography parameters and to evaluate the effectiveness of using the proposed program in the differential diagnosis of continued glioblastoma growth and post-radiation necrosis. Materials and methods. We examined 53 patients who were treated at the Samara Clinical Oncological Dispensary. All patients underwent CT scan in perfusion mode. The results of using the program were compared with the data that were calculated on the workstation of the GE Discovery CT750 HD computed tomograph. Results. Significant differences were found in CBV and CBF perfusion indices in groups with continued growth and post-radiation necrosis, verified by biopsy. The parameters calculated using the developed program did not differ significantly from the results obtained on a standard workstation. Conclusion. The application of the developed computer program for the analysis of CT perfusion does not depend on the equipment manufacturer, works with standard DICOM data, which increases the availability of a valuable diagnostic method. The results obtained using the proposed information technology make it possible to differentiate the continued growth of glioblastoma from post-radiation necrosis.

Abstract P140: Do Perfusion Computed Tomography Abnormalities in Patients With Transient Ischemic Attack Predict Subsequent Ischemic Stroke and Cardiovascular Event

Stroke ◽  
2021 ◽  
Vol 52 (Suppl_1) ◽  
Author(s):  
Aisha Abdulrazaq ◽  
Muhammad F Ishfaq ◽  
Sachin Bhagavan ◽  
Ammad Ishfaq ◽  
Brandi R French ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Ischemic Stroke ◽  
Cardiovascular Events ◽  
Ct Perfusion ◽  
Mean Transit Time ◽  
Imaging Protocol ◽  
Perfusion Computed Tomography ◽  
Blood Flow Reduction ◽  
Ischemic Attack

Background and purpose: To determine if computed tomography (CT) perfusion (CTP) abnormalities in patients with transient ischemic attacks (TIA) are associated with development of ischemic strokes or adverse cardiovascular events within 24 months. Methods: Patients with a diagnosis of TIA who underwent CTP within 24 hours of symptom onset as part of the stroke/TIA imaging protocol were analysed. Abnormality was defined as an area of well demarcated mean transit time delay and/or cerebral blood flow reduction corresponding to an arterial territory as identified by an independent neuroradiologist. The patients were followed for at least 3 months and up to 24 months to identify occurrence of ischemic stroke and cardiovascular events (myocardial infarction or ischemia). Results: A total of 78 patients (mean age 67.60 +/- 15.1 ; 48 were men) with a diagnosis of TIA. A total of 17 patients (22%) had documented CTP abnormalities. Patients with CTP abnormalities were older and more likely to be men. There was no difference in the rates of ischemic stroke (5.9 % vs 3.3 %), or cardiovascular events (0% versus 1.6 %) when patients with CTP abnormalities were compared to those with normal CTP. Conclusions: In patients with TIA, an abnormal CTP does not predict the occurence of new ischemic stroke or cardiovascular events during follow up.

Hyperperfusion on perfusion computed tomography following revascularization for acute stroke

2005 ◽  
Vol 46 (6) ◽  
pp. 610-615 ◽  
Author(s):  
T. B. Nguyen ◽  
C. Lum ◽  
J. D. Eastwood ◽  
P. K. Stys ◽  
M. Hogan ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Acute Stroke ◽  
Cerebral Blood Volume ◽  
Ct Perfusion ◽  
Intravenous Thrombolysis ◽  
Additional Patient ◽  
Ischemic Brain ◽  
Perfusion Computed Tomography ◽  
Arterial Thrombolysis

Purpose: To describe the findings of hyperperfusion on perfusion computed tomography (CT) in four patients following revascularization for acute stroke. Material and Methods: In 2002–2003, among a series of 6 patients presenting with an acute stroke and treated with intra-arterial thrombolysis, we observed the presence of hyperperfusion in 3 patients on the follow-up CT perfusion. We included an additional patient who was treated with intravenous thrombolysis and who had hyperperfusion on the follow-up CT perfusion. We retrospectively analyzed their CT perfusion maps. Cerebral blood volume (CBV) and cerebral blood flow (CBF) maps were compared between the affected territory and the normal contralateral hemisphere. Results: In the four patients, the mean CBV and CBF were 3.6±2.0 ml/100 g and 39±25 ml/100 g/min in the affected territory compared to the normal side (mean CBV = 2.7±2.1 ml/100 g, mean CBF = 27±23 ml/100 g/min). There was no intracranial hemorrhage in the hyperperfused territories. At follow-up CT, some hyperperfused brain areas progressed to infarction, while others retained normal white to gray matter differentiation. Conclusion: CT perfusion can demonstrate hyperperfusion, which can be seen in an ischemic brain territory following recanalization.

scholarly journals Correlation Analyses of Computed Tomography and Magnetic Resonance Imaging for Calculation of Prostate Volume in Colorectal Cancer Patients with Voiding Problems Who Cannot Have Transrectal Ultrasonography

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Sung Han Kim ◽  
Boram Park ◽  
Whi-An Kwon ◽  
Jae Young Joung ◽  
Ho Kyung Seo ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Colorectal Cancer ◽  
Computed Tomography ◽  
Magnetic Resonance ◽  
Cancer Patients ◽  
Prostate Volume ◽  
Transrectal Ultrasonography ◽  
Resonance Imaging ◽  
Preoperative Ct ◽  
Ct And Mri

Objective. To evaluate the value of computed tomography (CT) and magnetic resonance imaging (MRI) in determining total prostate volume (TPV) for patients with colorectal cancer, as an alternative to transrectal ultrasonography (TRUS) of the prostate when TRUS is not an option. Methods. We retrospectively evaluated the medical records of 122 male cancer patients who were referred to our urology department between 2014 and 2016 for voiding problems. They underwent colorectal surgery within 3 months; we estimated the correlations of the TPV measurements made using CT, MRI, and TRUS. A total of 122 TRUS, 88 MRI, and 34 CT images were reviewed repeatedly, twice by 2 independent urologists within 1 month after the initial evaluation. The correlations were statistically evaluated using a Bland-Altman plot and Spearman and Pearson correlation analyses. Results. Overall median age was 70.5 years and the median TPV, as measured using TRUS, CT, and MRI, was 33.2, 43.4, and 30.1 mL, respectively. There was a good correlation in TPV measured with CT (coefficient >0.7) and MRI (>0.8). There was not a good correlation between TRUS and preoperative and postoperative CT/MRI; preoperative CT/MRI had a higher correlation (>0.7) than postoperative CT/MRI (>0.8). When stratified by prostate volume, preoperative CT (>0.58-0.59) correlated better for <30 mL and preoperative MRI (0.70-0.75) correlated better for ≥30 mL. Conclusions. The study showed that preoperative MRI had the best correlation with TRUS, especially in prostates ≥30 mL despite overestimations in CT and MRI measurements compared with TRUS.

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