Thank you for this interesting question. At our institution, we assess each case individually rather than following a strict protocol. We repeat the MRI when artifacts or patient motion cause blurring in the MR sequence, compromising physician contouring. In other situations, we typically address the issue with MRI distortion correction. For small lesions or minor discrepancies, we generally prefer adding a 1 mm margin for malignant lesions rather than repeating the MRI.
Thank you for this interesting question. At our institution, we assess each case individually rather than following a strict protocol. We repeat the MRI when artifacts or patient motion cause blurring in the MR sequence, compromising physician contouring. In other situations, we typically address the issue with MRI distortion correction. For small lesions or minor discrepancies, we generally prefer adding a 1 mm margin for malignant lesions rather than repeating the MRI.