Comparison of CT only contour with MRI guided contouring in external beam radiotherapy for carcinoma rectum
Journal Title: International Journal of Medical Research and Review - Year 2017, Vol 5, Issue 10
Abstract
Aim:The purpose of the study is to compare CT only contour with MRI guided contour for delineation of the gross tumour volume (GTV) in carcinoma of rectum in external beam radiotherapy.Materials and Methods:18patients who underwent external beam radiotherapy treatment for carcinoma rectum were selected retrospectively. For all the patients, both CT and MRI were done as a part of planning process. Two sets of GTV were generated using only CT and with MRI assistance by a single oncologist. The generated contours were then compared and quantitatively analyzed using volume analysis and dice index.Results:The CT mean GTV was larger than the MRI mean GTV volume (68.54 ± 17.56 cc for CT versus 80.95 ± 19.19 cc for MRI). The dice index value between CT only GTV and MRI assisted GTV was 0.71 ± 0.13. The comparison of GTVs showed that the GTV_MRI was comparatively small and inside the GTV_CT except for six patients for whom GTV_MRI was marginally outside the GTV_CT.Conclusion:The study showed that using MRI guidance for GTV delineation in carcinoma rectum is preferable and more accurate as compared to CT-only imaging because of superior soft tissue contrast.
Authors and Affiliations
Sudha Rani, Katta Charu Goutham
Keywords
Related Articles
- EP ID EP276380
- DOI 10.17511/ijmrr. 2017.i10.07
- Views 138
- Downloads 0
Knowledge, attitude, practice and quality of life assessment in glaucoma- a cross sectional survey
Aim: To determine knowledge, attitude and practice of patients with glaucoma and to analyze the quality of life of patients with glaucoma using the GQL-15 questionnaire. Materials and Methods: 62 patients with a known di...
Commissioning of two different algorithms for stereotactic Radiosurgery M6 FI+ CyberKnife system
Introduction: Cyber Knife M6 FI+ a very precise robotic stereotactic radiosurgery system which is capable of delivering very high radiation dose to the tumour while minimizing radiation exposure to normal organs and tiss...
Insulin resistance and significance of postprandial lipid profile in normoglycemic coronary artery disease
Background: Coronary artery disease is a continuum of a pathological process, in which the coronary arteries gradually thicken, harden and atherosclerotic plaques develop which further occludes the blood flow. The preval...
Predictors of long term survival after surgical resection in carcinoma gall bladder
Background-Carcinoma of the gallbladder is known to be associated with a dismal prognosis, with majority of patients presenting at late stages. Controversies still exist regarding the optimal management and the extent of...
A rare case of tuberculous choroidal abscess
We report a case of ocular tuberculosis which presented as a subretinal abscess along with an active choroiditis patch and disc edema but with subtle ocular symptoms. Patient had a strongly positive Tuberculin Skin Testi...