Three-port perineal sparing technique

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Radiology; (United States)

DOI:https://doi.org/10.1148/radiology.180.2.2068328· OSTI ID:5198114

Spencer, S A; Pareek, P N; Brezovich, I; Larson, B J; Kim, R Y; Plott, W G; Meredith, R F; Smith, J W; Weppelmann, B; Soong, S J ^[1]

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1. Univ. of Alabama, Birmingham (USA)

The records were reviewed of 103 patients with low-lying pelvic malignancies irradiated with a skin-sparing technique involving use of a pair of anteroposterior-posteroanterior opposed ports and a direct perineal port. Patients had rectal, anal, cervical, vaginal, urethral, or vulvar cancer. Use of a special lead compensator allowed the three beams to be applied perpendicularly to the surface, while delivery of a homogeneous dose to the pelvis and perineum was maintained. Skin dose with this method was greatly reduced compared with that delivered with simple opposing or four-port techniques, in which irradiation is tangential to the surface at the perineum. Acute perineal skin irritation was assigned a grade between 0 and 3, with grade 0 representing the least amount of irritation. All patients were in the grade 0 or grade 1 category. Patients treated for low-lying rectal carcinoma showed no increase in perineal recurrences when compared with historic control subjects. Use of this approach allowed delivery of adequate doses to the pelvis and perineum and a definite decrease in local toxic effects, and local control was not compromised.

• OSTI ID: 5198114
• Journal Information: Radiology; (United States), Journal Name: Radiology; (United States) Vol. 180:2; ISSN RADLA; ISSN 0033-8419
• Country of Publication: United States
• Language: English

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62 RADIOLOGY AND NUCLEAR MEDICINE
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BIOLOGICAL SHIELDING
BODY
CARCINOMAS
DIGESTIVE SYSTEM
DISEASES
DOSES
GASTROINTESTINAL TRACT
INTESTINES
LARGE INTESTINE
LYMPH NODES
LYMPHATIC SYSTEM
MEDICINE
NEOPLASMS
NUCLEAR MEDICINE
ORGANS
PATIENTS
RADIATION DOSES
RADIATION PROTECTION
RADIOLOGY
RADIOTHERAPY
RECTUM
SHIELDING
SKIN
THERAPY