A spatially encoded dose difference maximal intensity projection map for patient dose evaluation: A new first line patient quality assurance tool

2011 ◽  
Vol 38 (4) ◽  
pp. 1748-1753 ◽  
Author(s):  
Weigang Hu ◽  
Pierre Graff ◽  
Thomas Boettger ◽  
Jean Pouliot
Keyword(s):  
Quality Assurance ◽  
Patient Dose ◽  
First Line ◽  
Dose Evaluation ◽  
Maximal Intensity ◽  
Maximal Intensity Projection ◽  
Dose Difference

scholarly journals Establishing a quality assurance baseline for radiological protection of patients undergoing diagnostic radiology

2011 ◽  
Vol 15 (3) ◽  
pp. 70 ◽  
Author(s):  
Geoffrey K Korir ◽  
Jeska Sidika Wambani ◽  
Ian K Korir
Keyword(s):  
Quality Control ◽  
Quality Assurance ◽  
Image Quality ◽  
Radiation Exposure ◽  
High Speed ◽  
Quality Criteria ◽  
Patient Dose ◽  
Radiological Protection ◽  
X Ray ◽  
High Speed Film

Background. The wide use of ionising radiation in medical care has resulted in the largest man-made cause of radiation exposure. In recent years, diagnostic departments in Kenya have adapted the high-speed film/screen combination without well-established quality control, objective image quality criteria, and assessment of patient dose. The safety of patients in terms of justification and the as-low-as-reasonably-achievable (ALARA) principle is inadequate without quality assurance measures. Aim. This study assessed the level of film rejects, device performance, image quality and patient dose in 4 representative hospitals using high-speed film/screen combination. Results. The X-ray equipment quality control tests performance range was 67% to 90%, and 63% of the radiographs were of good diagnostic value. The measured prevalent chest examination entrance surface dose (ESD) showed levels above the international diagnostic reference levels (DRLs), while lumbar spine and pelvis examination was the largest source of radiation exposure to patients. Conclusion. The optimisation of patient protection can be achieved with optimally performing X-ray equipment, the application of good radiographic technique, and continuous assessment of radiographic image quality.

Counterpoint: Hyperthermia with Radiation Therapy for Chest Wall Recurrences

2007 ◽  
Vol 5 (3) ◽  
pp. 345-348 ◽  
Author(s):  
Beryl McCormick
Keyword(s):  
Breast Cancer ◽  
Quality Assurance ◽  
Standard Care ◽  
Clinical Scenario ◽  
Breast Cancers ◽  
Optimal Temperature ◽  
Treatment Combination ◽  
First Line ◽  
Effective Treatment Option ◽  
Cancer Network

The 2007 National Comprehensive Cancer Network Breast Cancer Clinical Practice Guidelines in Oncology include a consideration for hyperthermia (HT) and radiation for women with recurrent locoregional advanced breast cancers after first-line surgery or radiation failed. Although HT in this setting has been used for several decades, recent reports are few. This article reviews the data from several recent studies, selected because they included at least 100 patients. Unresolved issues of radiation dose, optimal temperature and timing of HT, and quality assurance problems with thermometry are apparent from these studies. Although clearly an effective treatment option in this clinical scenario, more research on HT and radiation is needed before this treatment combination can be considered standard care.

CT-guided spinal infiltration: Patient dose evaluation

2016 ◽  
Vol 32 ◽  
pp. 309
Author(s):  
Cretti Fabiola ◽  
Lunghi Sandro ◽  
Rizzi Pierluigi
Keyword(s):  
Patient Dose ◽  
Ct Guided ◽  
Dose Evaluation

scholarly journals Interpretation of Gamma Index for Quality Assurance of Simultaneously Integrated Boost (SIB) IMRT Plans for Head and Neck Carcinoma

2017 ◽  
Vol 23 (4) ◽  
pp. 93-97 ◽  
Author(s):  
Maria Atiq ◽  
Atia Atiq ◽  
Khalid Iqbal ◽  
Quratul ain Shamsi ◽  
Farah Andleeb ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Head And Neck ◽  
Dose Distribution ◽  
Confidence Limit ◽  
Passing Rate ◽  
Gamma Analysis ◽  
Gamma Index ◽  
Integrated Boost ◽  
Calculated Dose ◽  
Dose Difference

Abstract Objective: The Gamma Index is prerequisite to estimate point-by-point difference between measured and calculated dose distribution in terms of both Distance to Agreement (DTA) and Dose Difference (DD). This study aims to inquire what percentage of pixels passing a certain criteria assure a good quality plan and suggest gamma index as efficient mechanism for dose verification of Simultaneous Integrated Boost Intensity Modulated Radiotherapy plans. Method: In this study, dose was calculated for 14 head and neck patients and IMRT Quality Assurance was performed with portal dosimetry using the Eclipse treatment planning system. Eclipse software has a Gamma analysis function to compare measured and calculated dose distribution. Plans of this study were deemed acceptable when passing rate was 95% using tolerance for Distance to agreement (DTA) as 3mm and Dose Difference (DD) as 5%. Result and Conclusion: Thirteen cases pass tolerance criteria of 95% set by our institution. Confidence Limit for DD is 9.3% and for gamma criteria our local CL came out to be 2.0% (i.e., 98.0% passing). Lack of correlation was found between DD and γ passing rate with R2 of 0.0509. Our findings underline the importance of gamma analysis method to predict the quality of dose calculation. Passing rate of 95% is achieved in 93% of cases which is adequate level of accuracy for analyzed plans thus assuring the robustness of SIB IMRT treatment technique. This study can be extended to investigate gamma criteria of 5%/3mm for different tumor localities and to explore confidence limit on target volumes of small extent and simple geometry.

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