TY - JOUR
T1 - Radiation therapy of external iliac lymph nodes with lateral pelvic portals
T2 - Identification of patients at risk for inadequate regional coverage
AU - Chun, Mison
AU - Timmerman, Robert D.
AU - Mayer, Rulon
AU - Ling, Marilyn N.
AU - Sheldon, John
AU - Fishman, Elliot K.
PY - 1995/1
Y1 - 1995/1
N2 - PURPOSE: To determine whether 'standard' lateral pelvic radiation therapy portals provide adequate margins for treating the external iliac lymph nodes (EILNs). MATERIALS AND METHODS: With computed tomographic (CT) data and a computerized algorithm, the course of the EILN chain was reconstructed in 48 patients. The marginal distance between a consistently localized portion of the EILNs and the anterior field border that was placed at the front of the pubic symphysis was recorded for each patient. RESULTS: The EILNs were covered adequately in only 50% of both men and women. More adequate EILN margins were observed in (a) women older than 68 years, (b) women with small anteroposterior separations, (c) men older than 70 years, and (d) men and women with a low central obesity index. Less adequate margins were observed in men who were obese or men with large anteroposterior separations. In the study population, no correlation was observed for sex, race, or tumor site. CONCLUSION: The authors recommend portals that are designed specifically for patients rather than standard portals that may inadequately cover the intended targets.
AB - PURPOSE: To determine whether 'standard' lateral pelvic radiation therapy portals provide adequate margins for treating the external iliac lymph nodes (EILNs). MATERIALS AND METHODS: With computed tomographic (CT) data and a computerized algorithm, the course of the EILN chain was reconstructed in 48 patients. The marginal distance between a consistently localized portion of the EILNs and the anterior field border that was placed at the front of the pubic symphysis was recorded for each patient. RESULTS: The EILNs were covered adequately in only 50% of both men and women. More adequate EILN margins were observed in (a) women older than 68 years, (b) women with small anteroposterior separations, (c) men older than 70 years, and (d) men and women with a low central obesity index. Less adequate margins were observed in men who were obese or men with large anteroposterior separations. In the study population, no correlation was observed for sex, race, or tumor site. CONCLUSION: The authors recommend portals that are designed specifically for patients rather than standard portals that may inadequately cover the intended targets.
KW - Computed tomography (CT), treatment planning
KW - Lymphatic system, therapeutic radiology
KW - Treatment planning
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U2 - 10.1148/radiology.194.1.7997542
DO - 10.1148/radiology.194.1.7997542
M3 - Article
C2 - 7997542
AN - SCOPUS:0028959062
SN - 0033-8419
VL - 194
SP - 147
EP - 150
JO - RADIOLOGY
JF - RADIOLOGY
IS - 1
ER -