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Insights into Imaging
Fig. 4 | Insights into Imaging

Fig. 4

From: Results of a diagnostic imaging audit in a randomised clinical trial in rectal cancer highlight the importance of careful planning and quality control

Fig. 4

a–d Sagittal and axial (oblique) T2-weighted MR images from two patients from different centres. Both these investigations were performed in the baseline setting; therefore, differences in image quality are irrespective of the effects of neoadjuvant treatment. Tumour borders are delineated with continuous red lines. White dashed line in a and c = plane of the axial MR image shown in b and d. a, b Both the sagittal and the axial sequences had a slice thickness of 4 mm. In both images, the rectal wall is not clearly defined. b Axial projection of the tumour. Structures in the mesorectal fat are not clearly visible. The image of the invasive front is blurred (arrows). No sequence perpendicular to the tumour was obtained for this patient. c, d Both the sagittal and the axial oblique sequences had a slice thickness of 3 mm. In both cases, the rectal wall is clearly defined, and invasion of the mesorectal fat is distinct. d The invasive front is indicated by white arrows

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