شماره ركورد :
419157
عنوان مقاله :
نقش شبيه سازي با سي تي اسكن درطراحي پرتو درماني
عنوان به زبان ديگر :
ROLE OF CT SIMULATION IN RADIATION THERAPY PLANNING
پديد آورندگان :
مهدوي، ربيع نويسنده دانشگاه علوم پزشكي بابل Mahdavi, S. R , مسلمي، داريوش نويسنده گروه راديوتراپي دانشكده پيراپزشكي- دانشگاه علوم پزشكي بابل Moslemi, D , مختارپور، نورالله نويسنده گروه راديوتراپي دانشكده پيراپزشكي- دانشگاه علوم پزشكي بابل Mokhtarpour, N , رضازاده، مهدي نويسنده Rezazadeh, M
اطلاعات موجودي :
دو ماهنامه سال 1387
رتبه نشريه :
علمي پژوهشي
تعداد صفحه :
9
از صفحه :
7
تا صفحه :
15
كليدواژه :
سي تي اسكن , طراحي درمان , شبيه سازي
چكيده لاتين :
BACKGROUND AND OBJECTIVE: Radiotherapy treatment planning (TP) is strongly dependent to the internal organs localizations and inhomogeneity dosimetric corrections based on computerized tomographic scanning (CTS) data. The purpose of this study was to compare the dose distribution parameters between CT-based corrected and non-corrected treatment plans for inhomogeneities within the irradiated volume. METHODS: Fifty three cases of head and neck, pelvis, abdomen and breast cancer were included in this project. All of them were imaged with same CTS machine. Each case was planned twice, one before and one after inhomogeneity CT-based correction with a two dimensional TP system. Statistical analysis was done after calculation the parameters of dose uniformity (Te), average (Davg), minimum (Dmin) and maximum (Dmax) doses for target volume (TV) and organs at risk (OAR). FINDINGS: Briefly, the ratios of mean differences of dosimetric parameter between before and after correction plans to the mean of same parameter after correction were obtained. Mean differences of Te, Davg, Dmin and Dmax for pelvis were -1.59% (p=0.30), -0.993 (p=0.5), -0.890% (p=0.91), 1.29% (p=0.05), respectively. Same parameters for head and neck region were 0%(p=0.5), 0.012(p=0.05), 0%(p=0.99) and 0%(p=1.00) and for chest wall treatment were 7.13%(p<0.001), 4.65%(p=0.04), 1.79%(p=0.37) and -1.61%(p=0.10), respectively CONCLUSION: Findings further confirm the positive effect of density correction in chest wall irradiation. Unexpectedly, minimum differences were in head and neck region which can be due to low and high density tissues compensation. Present study has shown the unique and effective application of CTS data for dosimetric error corrections rather than internal organ localizations. If not considered, the dosimetry deviations will be out of tolerance doses according to the limits defined by standard organizations (±5%) for tumors and normal tissues as well.
سال انتشار :
1387
عنوان نشريه :
مجله دانشگاه علوم پزشكي بابل
عنوان نشريه :
مجله دانشگاه علوم پزشكي بابل
اطلاعات موجودي :
دوماهنامه با شماره پیاپی سال 1387
كلمات كليدي :
#تست#آزمون###امتحان
لينک به اين مدرک :
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