The Radiological Physics Center (RPC) developed two heterogeneous anthropomorphic quality assurance phantoms for use in verifying the accuracy of radiation delivery: one for intensity-modulated radiation therapy (IMRT) to the pelvis and the other for stereotactic body radiation therapy (SBRT) to the thorax. The purpose of this study was to describe the design and development of these two phanto...

Purpose: In radiotherapy, the proper way to ensure that the dose delivered to a patient is correct and strongly agree with that simulated by his treatment plan currently requires a pre-treatment dosimetric verification. Although this procedure can be realised by using a combined detectorphantom system to monitor the patient plan dose delivered on a phantom, the quality of the entire treatment c...

Abstract In vivo dosimetry for patient radioprotection is a real challenge concerning new radiotherapy treatments. this study we aim to develop dosimeter based on tissue equivalent material, flexible and adaptable the morphology in order perform complex irradiation beams. Here, report evaluation standard beams of highly composed silicone elastomer containing leucomalachite green as radiochromic...

This report addresses uncertainties pertaining to brachytherapy single-source dosimetry preceding clinical use. The International Organization for Standardization (ISO) Guide to the Expression of Uncertainty in Measurement (GUM) and the National Institute of Standards and Technology (NIST) Technical Note 1297 are taken as reference standards for uncertainty formalism. Uncertainties in using det...

PURPOSE To analyze intraoperative (IO) dosimetry using transrectal ultrasound (TRUS), performed before and after prostate low-dose-rate brachytherapy (LDR-BT), and compare it to dosimetry performed 30 days following the LDR-BT implant (Day 30). MATERIAL AND METHODS A total of 236 patients underwent prostate LDR-BT using 125I that was performed with a three-dimensional TRUS-guided interactive ...

Computed tomography (CT) dosimetry normally uses an ionization chamber 100 mm long to estimate the computed tomography dose index (CTDI), however some reports have already indicated that small devices could replace the long ion chamber to improve quality assurance procedures in CT dosimetry. This paper presents a novel dosimetry system based in a commercial phototransistor evaluated for CT dosi...

PURPOSE VMAT involves multi-parameter modulations, thus presenting multi-dimensional challenges. Here, we present a viable approach to VMAT patient specific QA using EPID-based dosimetry for spine VMAT SRS casesMethods: Our spine VMAT SRS plans consisted of two full arcs and were optimized with 6 MV photons for a Varian Trilogy LINAC. The QA plans were computed by resetting all control points t...

2015 Jul;165(1-4):50-2. Abstract » 2. REHANI, M.M., BERRIS, T., TEMPLATES AND EXISTING ELEMENTS AND MODELS FOR IMPLEMENTATION OF PATIENT EXPOSURE TRACKING, Radiat. Prot. Dosimetry. (Jul. 2013). Abstract » 3. REHANI, M.M., FRUSH, D.P., BERRIS, T., EINSTEIN, A.J., Patient radiation exposure tracking: Worldwide programs and needs--Results from the first IAEA survey, Eur. J. Radiol. 81 10 (Oct. 201...

Transarterial radioembolization (TARE) effectively treats unresectable primary and metastatic liver tumors through intra-arterial injection of Yttrium-90 (90Y) beta particle emitting microspheres which implant around the tumor. Current dosimetry models are highly simplistic there is a large need for an image-based post-TARE, would improve treatment safety efficacy. post-TARE imaging 90Y bremsst...

This paper presents ongoing actions in Dubai on patient dose monitoring in digital radiographic examinations, mammography, interventional procedures, and dental radiological procedures. The aim of Dubai Health Authority (DHA) is to move towards the establishment of local diagnostic reference levels. DHA has participated in national and regional projects under the umbrella of the International A...