Background: Chest radiography is one of the most commonly performed examinations as routine check-ups in radiology departments. Radiographers should be concerned with minimizing patient radiation dose while maintaining high diagnostic image quality. Objective: This study aimed to investigate effect increasing tube potential (kV) and adding filtration on quality for posteroanterior (PA) chest using a digital (DR) system. Materials methods: Eighty-five kV no filter was used reference exposure...

The use of computed tomography (CT) scanning has been growing steadily. Therefore, CT dose measurement is becoming increasingly important for patient protection and optimization. A phantom an tool measurement. This paper focuses on the evaluation a dosimetry made from nylon, instead standard polymethyl methacrylate (PMMA), which not readily available or too expensive in some countries. Comparison between phantoms two materials terms measurements indices (CTDI). These were measured four...

Cone-beam CT (CBCT) is an imaging technique used in conjunction with radiation therapy. For example CBCT to verify the position of lung cancer tumours just prior treatment. The accuracy treatment thoracic and upper abdominal structures heavily affected by respiratory movement. Such movement typically blurs reconstruction ideally should be removed. Hence motion-compensated has recently been researched for correcting image artefacts due breathing motion. This paper presents a new dual-modality...

Purpose. This study aimed to identify proper exposure techniques maintain optimal diagnostic image quality with minimum radiation dose for anteroposterior chest X-ray projection in pediatric patients. Methods. Briefly, an in-house developed phantom was constructed. Next, nanodot OSLDs were used organ absorbed measurement and placed the lung area, exposed various (ranging from 50 70 kVp 1.6, 2, 2.5 mAs). After that, assess parameters, including SNR CNR. Two radiologists assessed subjective...

Automatic tube current modulation (ATCM) systems to aid in optimizing dose and image noise have become standard on computed tomography (CT) scanners over the last decade. ATCM of main vendors modulate slightly different ways, with some using a control parameter related (e.g. Toshiba, GE) while others use quality reference mAs Siemens). The translation clinical protocols including operation between CT from manufacturers order obtain similar levels optimized exposure variables has an important...

In diagnostic radiology, entrance surface air kerma (ESAK) is one of the patient radiation dose quantities, and effective used as an estimator possible risk for exposure level. Calculation ESAK requires both X-ray machine parameters parameters. Due to high performance smartphones increase in mobile applications, this study aimed develop a application estimate general radiography. The calculator was then developed using Android studio software, which standalone operating on system version 5.0...

Background: Lumbar spine radiography plays an important role in routine use for clinical practice overweight and obese patients. The radiographer is responsible setting suitable exposure factors the tradeoffs between radiation dose image quality (IQ). Objective: To investigate effect of different kVp values combined with AEC used on IQ lumbar Materials methods: A 1.5 3 cm thickness frozen pork lard was placed a pelvis phantom to simulate patient, respectively. imaged at 10 intervals...

Electrical impedance tomography (EIT) is a new and emerging tomographic imaging system, which able to provide high temporal resolution with low spatial resolution. In past few years, the EIT has been extensively studied for lung monitoring. Cone beam CT (CBCT) an system used in radiation therapy unit. The CBCT suffers from motion artefacts, making treatment planning inaccurate. This problem very severe cancer therapy. this study dual modality of EIT-CBCT proposed. Feasibility such...