On the account of this, the target volume of MRI was close to that of the CT, and the volume ratio approached 1.0, indicating that according to the surgeon’s clinical experience, extending 1.0 cm from GTV to obtain the corresponding CTV was practically significant, perhaps for further confirmation of pathological margins during surgery.
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Comparison of postoperative CT- and preoperative MRI-based breast tumor bed contours in prone position for radiotherapy after breast-conserving surgery.
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