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題 名 | Impact of the Body-Mass Factors on Set-up Displacement in Patients Treated with Pelvic Irradiation for Gynecological Cancer with Daily On-Line Image Guidance=以每日影像導引放射治療分析婦癌患者的身體相關因子對於骨盆腔放射治療時之治療位置設定誤差的影響 |
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作 者 | 賴宥良; 游浚彥; 梁基安; 陳尚文; | 書刊名 | 放射治療與腫瘤學 |
卷 期 | 21:1 2014.03[民103.03] |
頁 次 | 頁21-30 |
分類號 | 418.94 |
關鍵詞 | 婦癌; 設定誤差; 影像導引; 身體相關引子; Gynecological cancer; Setup displacement; Image-guided radiotherapy; Body-mass factors; |
語 文 | 英文(English) |
中文摘要 | 目的:本研究探討分析婦癌患者的身體相關因子對於骨盆腔放射治療時之治療位置設定誤差的影響。材料與方法:我們收集了22位因子宮頸癌或子宮內膜癌而接受骨盆腔強度調放射治療的病人的身體相關因子,包括體重、身高、身體質量指數(BMI)、腰圍、腰徑、臀圍、臀徑:並取得這些病患在使用影像導引技術(IGRT)下觀察到之每日即時影像(OBI)的治療位置設定校正數值,這些數值包括了上下、前後、左右、治療床旋轉等四種方向的系統誤差和隨機誤差。我們將這些病人的身體相關因子之中位數當作切割點,使用Mann-Whitney U檢定法來分析這些因子對治療位置設定誤差所造成的影響。結果:上下、前後、左右方向的系統誤差和隨機誤差分別是2.8公釐、2.6公釐、2.4公釐以及1.7公釐、1.4公釐、1.3公釐。旋轉角度的系統誤差和隨機誤差分別是0.33和0.25度。較大的腰圍與較大的上下-系統誤差(p = 0.02)及旋轉-隨機誤差(p = 0.013)有正相關。較大的臀圍導致較大的上下-隨機誤差(p = 0.045)與旋轉-隨機誤差(p = 0.018)。較大的身體質量指數引起較大的旋轉-隨機誤差(p = 0.006)。較高的身高導致較大的前後-系統誤差(p = 0.036)。結論:對於擁有腰圍大於80.5公分、或臀圍大於88.5公分、或身體質量指數大於22.1的婦癌病人,我們建議使用即時影像導引技術以減少治療位置的設定誤差。 |
英文摘要 | Purpose: This study was to determine the impact of the body-mass factors on magnitude of setup displacements in patients treated with pelvic intensity modulated radiotherapy (IMRT) for gynecological cancer.Methods: Using the alignment data of daily on-line On Board Imaging (OBI) from image-guided radiotherapy (IGRT), the clinical data of 22 patients treated with pelvic IMRT for cervical or endometrial cancer was analyzed. Body-mass factors included body weight, body height, body mass index (BMI), waist circumference, waist thickness, hip circumference and hip thickness. Setup displacements for each patient were assessed by four components: namely systemic error (SE), and random error (RE), through three translational directions and couch rotation (CR). The median values for the body-mass factors were used as cutoff points to divide the groups. The Mann-Whitney U test was conducted to assess the predictive role of these factors for the set-up errors.Results: Population SE and RE were 2.8 mm, 2.6 mm, 2.4 mm and 1.7 mm, 1.4 mm, 1.3 mm in the superior-inferior (SI), anterior-posterior (AP) and medial-lateral (ML) directions, respectively. The SE and RE for rotation (CR) was 0.33 and 0.25 degree. Larger waist circumference (WC) was significantly correlated with greater SI-SE (p = 0.02), and CR-RE (p = 0.013), whereas larger hip circumference (HC) with greater SI-RE (p = 0.045), and CR-RE (p = 0.018). Higher BMI was associated with greater, CR-RE (p = 0.006). Body height correlated with AP-SE (p = 0.036).Conclusions: To reduce setup displacements in women with gynecological cancer requiring pelvic IMRT, the use of on-line IGRT should be recommended for those who have a WC > 80.5 cm or a HC > 88.8 cm, or a BMI >22.1 Kg/m^2. |
本系統中英文摘要資訊取自各篇刊載內容。