Breast electron boost planning: comparison of CT and US.
Radiology
; 219(1): 203-6, 2001 Apr.
Article
em En
| MEDLINE
| ID: mdl-11274557
ABSTRACT
PURPOSE:
To compare computed tomography (CT) with ultrasonography (US) for depiction of the biopsy cavity. MATERIALS ANDMETHODS:
Thirty-two consecutive patients who underwent radiation therapy following lumpectomy with a planned electron boost were examined. At the time of simulation for whole-breast radiation therapy, all patients underwent planning CT (CT 1) at 3-mm section intervals. At the time of electron boost simulation, US was performed to define the biopsy cavity. In 17 cases, a second CT examination (CT 2) was performed at the time of electron boost simulation. CT and US studies were reviewed jointly and assigned a cavity visualization score (CVS) of 1 (cavity not visualized) to 5 (all cavity margins clearly defined).RESULTS:
The median CVS at CT 1 was 5; at CT 2, 4; and at US, 4. For patients who underwent all three studies, the median CVS at CT 1 was 5; at CT 2, 4; and at US, 4. Factors related to CVS at CT 1 were homogeneous versus heterogeneous appearance (score, 5 vs 4), surgery-to-CT interval (< or =30 days, 5; 31-60 days, 4; >60 days, 4), and cavity size (>15 cm(3), 5; <15 cm(3), 4). In all cases, cavity volume decreased somewhat during the CT 1-to-CT 2 interval.CONCLUSION:
CT performed at the time of whole-breast simulation can be used to plan electron boost fields, with cavity visualization similar to that at US.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Planejamento da Radioterapia Assistida por Computador
/
Neoplasias da Mama
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Mastectomia Segmentar
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Tomografia Computadorizada por Raios X
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Ultrassonografia Mamária
Tipo de estudo:
Prognostic_studies
Limite:
Adult
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Aged
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Female
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Humans
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Middle aged
Idioma:
En
Revista:
Radiology
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Estados Unidos