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KMID : 0861420120160020062
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Korean Journal of Nuclear Medicine Technology
2012 Volume.16 No. 2 p.62 ~ p.67
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The Variation of Scan Time According to Patient’s Breast Size and Body Mass Index in Breast Sentinel lymphangiography
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Lee Da-Young
Namkoong Hyuk
Cho Seok-Won
Oh Shin-Hyun
Lim Han-Sang
Kim Jae-Sam
Lee Chang-Ho
Park Hoon-Hee
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Abstract
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Purpose:At this time, the sentinel lymph node mapping using radioisotope and blue dye is preceded for breast
cancer patient’s sentinel lymph node biopsy. But all patients were applied the same protocol without
consideration of physical specific character like the breast sizes and body mass indexes. The purpose of this
study is search the optimized scan time in breast sentinel lymphangiography by observing how much the body
mass index and breast size influence speed of lymphatic flow.
Materials and Methods: The Object of this study was 100 breast cancer patients(Female, 100 persons, average age 50.34±10.26 years old)at Severance hospital from October 2011 to December 2011. They were scanned breast sentinel lymphangiography before operation. This study was performed on Forte dual heads gamma camera (Philips Medical Systems, Nederland B.V.). All patients were intra-dermal injected 99mTc-Phytate 18.5 MBq, 0.5 ml. For 80 patients, we have scanned without limitation of scan time until the lymphatic flow from the lymph node since injection. We measured how long the lymphatic flow time between departures from injects site and arrival to lymph node using stopwatch. After we
calculated patient’s Body mass Index and classified as 4 groups. And we measured patient’s breast size and
classified 3 groups. The modified breast lymphangiography that changing scan time according to comparison
study’s result was performed on 20 patients and was estimated.
Results:The mean scan time as breast size was
A group 2.48 minutes, B group 7.69 minutes, C group 10.43 minutes. The mean scan time as body mass index
was under weight 1.35 minutes, normal weight 2.56 minutes, slightly over 5.62 minutes, over weighted 5.62
minutes. The success rate of modified breast lymphangiography was 85%.
Conclusion: As the Body mass index became higher and breast size became bigger, the total scan time is increased. Based on the obtained information, we designed modified breast lymphangiography protocol. At the cases applying that protocol, most of sentinel lymph nodes were visualized as lymphatic pool. In conclusion, we found that the more success rate in modified protocol considering physical individuality than study carrying out in the same protocol.
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KEYWORD
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Breast cancer, Sentinel Lymphangiography, Breast size, Body Mass Index
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