B. Madsen
Virginia Mason Medical Center
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Featured researches published by B. Madsen.
Obstetrics & Gynecology | 1999
Howard G. Muntz; Barbara A. Goff; B. Madsen; Joseph L. Yon
BACKGROUND Women with endometrial carcinoma are being treated with laparoscopic surgery, but the risk of port-site recurrences remains undefined. CASE A 58-year-old woman underwent laparoscopically assisted vaginal hysterectomy, bilateral salpingo-oophorectomy, and laparoscopic lymphadenectomy for endometrial cancer. Final surgical stage was IA, with grade 2 histology. Twenty-one months later, she developed a 5-cm recurrent tumor mass at a lateral laparoscopic port site. The mass was resected, and a restaging laparotomy performed, without evidence of other metastases. Radiation therapy was administered to the involved anterior abdominal wall. Two and one half years later, there is no evidence of recurrence. CONCLUSION An isolated laparoscopic port-site recurrence might be attributable to the initial laparoscopic management of an otherwise good-prognosis endometrial carcinoma.
International Journal of Radiation Oncology Biology Physics | 2003
B. Madsen; R. Alex Hsi; Huong T. Pham; Joseph Presser; Laura Esagui; John M. Corman; L. Myers; Douglas L. Jones
Abstract Purpose To evaluate the stability of the prostate during stereotactic radiation therapy. Methods and materials Forty-seven patients underwent placement of three fiducial markers into the prostate as part of a pilot study of hypofractionated stereotactic radiotherapy. Portal images before and subsequent to 227 radiotherapy fractions were analyzed for prostate movement. Six patients also underwent localizing radiographs at 6-min intervals for 24 min. Relative motion of the bony landmarks and prostate markers was calculated. Results Analysis of portal images revealed the undirected average prostate movement of 2.0 mm (superior/inferior), 1.9 mm (anterior/posterior), and 1.4 mm (right/left) with maximum standard deviation (SD) of 2.0. Analysis of radiographs at 6-min intervals showed the greatest undirected average prostate motion between 0–6 min; 1.5 mm (superior/inferior), 1.4 mm (anterior/posterior), and 0.4 mm (right/left). Beyond 6 min, movements decreased to 0.4, 0.9, and 0.8 mm, respectively. Bony landmark motion was 0.9 mm (superior/inferior), 0.9 mm (anterior/posterior), and 0.4 mm (right/left) between 0–6 min. Beyond 6 min, motion decreased to less than 0.5 mm in any direction. Conclusions Stereotactic prostate radiotherapy, utilizing fiducial marker localization, resulted in average intrafractional prostate movement of 2.0 mm or less. Most patient and organ movement occurs early and a settling-in period is advisable before treatment.
Cancer Journal | 2002
Richard A. Hsi; B. Madsen; John W. Rieke; Christine M. Cha; Huong T. Pham; John M. Corman
PURPOSE To evaluate the stability of the prostate during stereotactic radiation therapy. MATERIALS AND METHODS Forty-seven patients underwent placement of three fiducial markers into the prostate as part of a pilot study of hypofractionated stereotactic radiotherapy. Portal images before and subsequent to 227 radiotherapy fractions were analyzed for prostate movement. Six patients also underwent localizing radiographs at 6-min intervals for 24 min. Relative motion of the bony landmarks and prostate markers was calculated. RESULTS Analysis of portal images revealed the undirected average prostate movement of 2.0 mm (superior/inferior), 1.9 mm (anterior/posterior), and 1.4 mm (right/left) with maximum standard deviation (SD) of 2.0. Analysis of radiographs at 6-min intervals showed the greatest undirected average prostate motion between 0-6 min; 1.5 mm (superior/inferior), 1.4 mm (anterior/posterior), and 0.4 mm (right/left). Beyond 6 min, movements decreased to 0.4, 0.9, and 0.8 mm, respectively. Bony landmark motion was 0.9 mm (superior/inferior), 0.9 mm (anterior/posterior), and 0.4 mm (right/left) between 0-6 min. Beyond 6 min, motion decreased to less than 0.5 mm in any direction. CONCLUSIONS Stereotactic prostate radiotherapy, utilizing fiducial marker localization, resulted in average intrafractional prostate movement of 2.0 mm or less. Most patient and organ movement occurs early and a settling-in period is advisable before treatment.
International Journal of Radiation Oncology Biology Physics | 2007
B. Madsen; R. Alex Hsi; Huong T. Pham; Jack F. Fowler; Laura Esagui; John M. Corman
International Journal of Radiation Oncology Biology Physics | 2010
Huong T. Pham; G. Song; K. Badiozamani; M. Yao; John M. Corman; R.A. Hsi; B. Madsen
International Journal of Radiation Oncology Biology Physics | 2004
B. Madsen; Huong T. Pham; R.A. Hsi; Joseph Presser; Laura Esagui; N. Collins; T. Lawrence; G. Song; K. Badiozamani; M. Hunter; E. Taylor
International Journal of Radiation Oncology Biology Physics | 2006
B. Madsen; R.A. Hsi; Huong T. Pham; Jack F. Fowler; Laura Esagui; John M. Corman
International Journal of Radiation Oncology Biology Physics | 2001
B. Madsen; Douglas L. Jones; R.A. Hsi; C. Cha; John W. Rieke
International Journal of Radiation Oncology Biology Physics | 2000
Douglas L. Jones; B. Madsen
International Journal of Radiation Oncology Biology Physics | 2008
R.A. Hsi; F. Vali; H. Parsai; E. Garver; B. Madsen; Huong T. Pham; G. Song; K. Badiozamani; P. Cho