Abstract:
PURPOSE:To evaluate major geometric variations in multiple intracavitary applications for carcinoma of the cervix. MATERIALS AND METHODS:Orthogonal radiographs were reviewed of 17 consecutive patients with carcinoma of the cervix treated with 70 applications of high-dose-rate brachytherapy. In seven patients, conscious sedation was used for all applications. In 10 patients, general anesthesia was used for the first application and conscious sedation for subsequent applications. Major geometric variation between applications in axis, length, and slippage in tandem placement and separation, packing, and slippage in colpostats placement were reviewed. A major variation was defined as more than 1.0-cm deviation. RESULTS:Major variations between applications occurred more commonly in colpostats placement than in tandem placement. For tandems, the rates of variation were 5.7% in axis, 4.3% in length, and 1.4% in slippage. For colpostats, rates of variation were 7.1% in separation, 25.7% in vaginal packing, and 7.1% in slippage. No consistent pattern of variation was found between applications except in vaginal packing. CONCLUSION:Awareness of geometric variations should improve proper placement of intracavitary applicators for brachytherapy.
journal_name
Radiologyjournal_title
Radiologyauthors
Kim RY,Meyer JT,Plott WE,Spencer SA,Meredith RF,Jennelle RL,Salter MMdoi
10.1148/radiology.195.2.7724760subject
Has Abstractpub_date
1995-05-01 00:00:00pages
419-22issue
2eissn
0033-8419issn
1527-1315journal_volume
195pub_type
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