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Quality assurance of multifractionated pelvic interstitial brachytherapy for postoperative recurrences of cervical cancers: a prospective study

In International Journal of Radiation Oncology Biology Physics
By: Shukla P.
Contributor(s): Shrivastava SK | Sv J | Phurailatpam R | Paul SN | Mahantshetty U | Engineer R | Chopra S | .
Material type: materialTypeLabelArticleSeries: Vol 82 Issues 4.Publisher: 2012Description: e617-e622.Subject(s): Reirradiation | Quality assurance | Brachytherapy | Interstitial | Cervix | DDC classification: In: International Journal of Radiation Oncology Biology PhysicsSummary: PURPOSE: To evaluate three-dimensional needle displacements during multifractionated interstitial brachytherapy (BT) for cervical cancers. METHODS AND MATERIALS: Patients scheduled to undergo pelvic interstitial BT for postoperative and or postradiation vault recurrences were included from November 2009 to December 2010. All procedures were performed under spinal anesthesia. Postprocedure BT planning CT scans were obtained with patients in supine position with arms on the chest (interslice thickness of 3 mm). Thereafter, verification CT was repeated at every alternate fraction. Needle displacements were measured in reference to a relocatable bony point. The mean cranial, caudal, anteroposterior, and mediolateral displacements were recorded. Statistical significance of mean interfraction displacements was evaluated with Wilcoxon Test. RESULTS: Twenty patients were included. Seventeen received boost BT (20 Gy/5 fractions/3 days) after external radiation, three received radical BT alone (36 Gy/9 fraction
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PURPOSE: To evaluate three-dimensional needle displacements during multifractionated interstitial brachytherapy (BT) for cervical cancers.

METHODS AND MATERIALS: Patients scheduled to undergo pelvic interstitial BT for postoperative and or postradiation vault recurrences were included from November 2009 to December 2010. All procedures were performed under spinal anesthesia. Postprocedure BT planning CT scans were obtained with patients in supine position with arms on the chest (interslice thickness of 3 mm). Thereafter, verification CT was repeated at every alternate fraction. Needle displacements were measured in reference to a relocatable bony point. The mean cranial, caudal, anteroposterior, and mediolateral displacements were recorded. Statistical significance of mean interfraction displacements was evaluated with Wilcoxon Test.

RESULTS: Twenty patients were included. Seventeen received boost BT (20 Gy/5 fractions/3 days) after external radiation, three received radical BT alone (36 Gy/9 fraction

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