Radium implant to the parametrium in the treatment of Stage IIIB carcinoma of the cervix: analysis of dosimetry
Radium needle implant to the parametrium in order to supplement the dose rates to the cervix, parametrium and pelvic wall from a protruding intrauterine tandem was simulated using the skeleton of an adult pelvis in a water phantom. The results of direct dosimetry are presented. The parametrial implant approach was instituted in our clinic in 1975 to minimize local failures, especially parametrial, in Stage IIIB carcinoma of the cervix. The technique is used with patients who cannot accommodate two vaginal ovoids with the intrauterine tandem for conventional intracavitary radium therapy because of the extent of the neoplastic disease. Our dosimetric results showed an increase in the parametrial and pelvic wall dose rates of better than 60% with a typical implant of six half-intensity (0.33 mg/cm) needles to the affected parametrium; the bladder and rectum dose rates increased by less than 17%. There was a relatively minimal (8 to 13%) increase in the dose rates to other pelvic node-bearing sites. Results for a minimal implant to both proximal parametria and a clinical example of the parametrial implant application are also presented.
- Research Organization:
- Univ. of Maryland Hospital, Baltimore
- OSTI ID:
- 6758890
- Journal Information:
- Int. J. Radiat. Oncol., Biol. Phys.; (United States), Vol. 6:7; Conference: 21. annual meeting of the American Society of therapeutic Radiologists, New Orleans, LA, USA, 28 Oct 1979
- Country of Publication:
- United States
- Language:
- English
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63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
61 RADIATION PROTECTION AND DOSIMETRY
BLADDER
RADIATION DOSE DISTRIBUTIONS
CARCINOMAS
PELVIS
RADIATION SOURCE IMPLANTS
DOSIMETRY
RECTUM
INTERNAL IRRADIATION
IRRADIATION CAPSULES
ISODOSE CURVES
PATIENTS
PHANTOMS
RADIOTHERAPY
RADIUM
UROGENITAL SYSTEM DISEASES
ALKALINE EARTH METALS
BODY
BODY AREAS
DIGESTIVE SYSTEM
DISEASES
ELEMENTS
GASTROINTESTINAL TRACT
IMPLANTS
INTESTINES
IRRADIATION
LARGE INTESTINE
MEDICINE
METALS
MOCKUP
NEOPLASMS
NUCLEAR MEDICINE
ORGANS
RADIATION SOURCES
RADIOLOGY
STRUCTURAL MODELS
THERAPY
URINARY TRACT
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