A multi-institutional dosimetry audit of rotational intensity-modulated radiotherapy
| Autor: | Dean Wilkinson, Andrew Nisbet, Y. Tsang, J A D Snaith, Graham Bass, C. Gouldstone, Catharine H. Clark, K Venables, Russell Thomas, R F Nutbrown, Steve Bolton, Mohammad Hussein |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Medical Audit
medicine.medical_specialty Phantoms Imaging business.industry medicine.medical_treatment Radiotherapy Dosage Hematology Audit Patient Care Planning Tomotherapy Radiation therapy Oncology Treatment delivery medicine Dosimetry Radiology Nuclear Medicine and imaging Medical physics Radiotherapy Intensity-Modulated Intensity modulated radiotherapy Radiometry Radiation treatment planning business |
| Zdroj: | Radiotherapy and Oncology. 113:272-278 |
| ISSN: | 0167-8140 |
| DOI: | 10.1016/j.radonc.2014.11.015 |
| Popis: | Rotational IMRT (VMAT and Tomotherapy) has now been implemented in many radiotherapy centres. An audit to verify treatment planning system modelling and treatment delivery has been undertaken to ensure accurate clinical implementation.34 institutions with 43 treatment delivery systems took part in the audit. A virtual phantom planning exercise (3DTPS test) and a clinical trial planning exercise were planned and independently measured in each institution using a phantom and array combination. Point dose differences and global gamma index (γ) were calculated in regions corresponding to PTVs and OARs.Point dose differences gave a mean (±sd) of 0.1±2.6% and 0.2±2.0% for the 3DTPS test and clinical trial plans, respectively. 34/43 planning and delivery combinations achieved all measured planes with95% pixels passing γ1 at 3%/3mm and rose to 42/43 for clinical trial plans. A statistically significant difference in γ pass rates (p0.01) was seen between planning systems where rotational IMRT modelling had been designed for the manufacturer's own treatment delivery system and those designed independently of rotational IMRT delivery.A dosimetry audit of rotational radiotherapy has shown that TPS modelling and delivery for rotational IMRT can achieve high accuracy of plan delivery. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect