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KMID : 1164220120240010039
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Journal of Korean Society for Radiotherapeutic Technology
2012 Volume.24 No. 1 p.39 ~ p.43
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The Investigation Image-guided Radiation Therapy of Bladder Cancer Patients
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Bae Seong-Soo
Bae Sun-Myeong
Kim Jin-San
Kang Tae-Young
Back Geum-Mun
Kwon Kyung-Tae
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Abstract
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Purpose: In hospital image-guided radiation therapy in patients with bladder cancer to enhance the reproducibility of the appropriate amount, depending on the patient’s condition, and image-guided injection of saline system (On-Board Imager system, OBI, VARIAN, USA) three of the Cone-Beam CT dimensional matching (3D-3D matching) to be the treatment. In this study, the treatment of patients with bladder cancer at Cone-Beam CT image obtained through the analysis of the bones based matching and matching based on the bladder to learn about the differences, the bladder’s volume change injected saline solution by looking at the bladder for the treatment of patients with a more appropriate image matching is to assess how the discussion.
Materials and Methods: At our hospital from January 2009 to April 2010 admitted for radiation therapy patients, 7 patients with bladder cancer using a Folly catheter of residual urine in the bladder after removing the amount determined according to individual patient enough to inject saline CT-Sim was designed after the treatment plan. After that, using OBI before treatment to confirm position with Cone-Beam CT scan was physician in charge of matching was performed in all patients. CBCT images using a total of 45 bones, bladder, based on image matching and image matching based on the difference were analyzed. In addition, changes in bladder volume of Eclipse (version 8.0, VARIAN, USA) persuaded through.
Results: Bones, one based image matching based on the bladder and re-matching the X axis is the difference between the average 3±2㎜, Y axis,1.8±1.3㎜ , Z-axis travel distance is 2.3±1.7㎜ and the overall 4.8±2.0㎜, respectively. The volume of the bladder compared to the baseline showed a difference of 4.03±3.97㎜.
Conclusion: Anatomical location and nature of the bladder due to internal movement of the bones, even after matching with the image of the bladder occurred in different locations. In addition, the volume of saline-filled bladder showed up the difference between the 4.03 percent, but matched in both images to be included in the planned volumes were able to confirm. Thus, after injection of saline into the bladder base by providing a more accurate image matching will be able to conduct therapy.
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KEYWORD
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image-guided radiation therapy, bladder filling, OBI, 2D match, 3D match
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