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Assessment of transposed ovarian movement: how much of a safety margin should be added during pelvic radiotherapy?

Soda I, Ishiyama H, Ono S, Takenaka K, Arai M, Arai T, Iwase H, Sekiguchi A, Kawakami S, Komori S, Onda T, Hayakawa K - J. Radiat. Res. (2015)

Bottom Line: The 95% RI in the corresponding directions were 1.5, 2.0, 1.7, 1.2, 1.9 and 1.2 cm, respectively.These data suggest that bilateral ovaries need a PRV margin of ∼2 cm in all directions.The present study suggests that a transposed ovary needs the same PRV margin as a normal ovary (∼2 cm).

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology and Radiation Oncology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minamiku, Sagamihara, Kanagawa 252-0374, Japan itaruso@kitasato-u.ac.jp.

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Superimposed pelvic CT images. Two images taken at different times were matched on bony structures. The differences in ovarian position (red and green lines) between CT images were measured.
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RRU116F1: Superimposed pelvic CT images. Two images taken at different times were matched on bony structures. The differences in ovarian position (red and green lines) between CT images were measured.

Mentions: CT images including transposed ovaries were superimposed on other CT images acquired at different times, and were matched on bony structures. The first CT after ovarian transposition was defined as the reference image data. The center of the ovary was used as a representative position for each ovary. The differences in ovarian position relative to bony structures between CT images were analyzed using the treatment planning system (Pinnacle; Philips, Fitchburg, WI, USA; Fig. 1). A total of 123 images were analyzed.Fig. 1.


Assessment of transposed ovarian movement: how much of a safety margin should be added during pelvic radiotherapy?

Soda I, Ishiyama H, Ono S, Takenaka K, Arai M, Arai T, Iwase H, Sekiguchi A, Kawakami S, Komori S, Onda T, Hayakawa K - J. Radiat. Res. (2015)

Superimposed pelvic CT images. Two images taken at different times were matched on bony structures. The differences in ovarian position (red and green lines) between CT images were measured.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4380061&req=5

RRU116F1: Superimposed pelvic CT images. Two images taken at different times were matched on bony structures. The differences in ovarian position (red and green lines) between CT images were measured.
Mentions: CT images including transposed ovaries were superimposed on other CT images acquired at different times, and were matched on bony structures. The first CT after ovarian transposition was defined as the reference image data. The center of the ovary was used as a representative position for each ovary. The differences in ovarian position relative to bony structures between CT images were analyzed using the treatment planning system (Pinnacle; Philips, Fitchburg, WI, USA; Fig. 1). A total of 123 images were analyzed.Fig. 1.

Bottom Line: The 95% RI in the corresponding directions were 1.5, 2.0, 1.7, 1.2, 1.9 and 1.2 cm, respectively.These data suggest that bilateral ovaries need a PRV margin of ∼2 cm in all directions.The present study suggests that a transposed ovary needs the same PRV margin as a normal ovary (∼2 cm).

View Article: PubMed Central - PubMed

Affiliation: Department of Radiology and Radiation Oncology, Kitasato University School of Medicine, 1-15-1 Kitasato, Minamiku, Sagamihara, Kanagawa 252-0374, Japan itaruso@kitasato-u.ac.jp.

Show MeSH
Related in: MedlinePlus