Strategies for Radiation Dose Optimization

Thakur, Yogesh; McLaughlin, Patrick D.; Mayo, John R.

doi:10.1007/s40134-013-0007-y

Cited by 17 publications

(19 citation statements)

References 49 publications

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“…In this work it was used two different chest adult phantoms to observe the dose distribution and to obtain the dose index. Different protocols were used in the phantom CT scans using two X-ray tube voltages [12][13][14].…”

Section: The Phantoms Have Five Openings For Positioning Dosimeters mentioning

confidence: 99%

“…In the examination room, the adult phantoms have been placed on the table and, with the aid of laser lights; they were oriented so that their central axis passed through the isocenter of the gantry during the table displacement [19,20]. They central area of the phantoms were scanned in helical mode with voltages of 120 and 135 kV using the system automatic control, electrical current in automatic, in the rage of 50 to 500 mA [12,13,20]. The scan distance was 10 cm, with pitch of 1,388 using 80 detectors of 0.5 mm.…”

Section: Scanning Protocolsmentioning

confidence: 99%

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2019

Int J Radiol Imaging Technol

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Section: The Phantoms Have Five Openings For Positioning Dosimeters mentioning

confidence: 99%

Section: Scanning Protocolsmentioning

confidence: 99%

Untitled

2019

Int J Radiol Imaging Technol

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“…The DLP is reported in units of mGy centimeter (mGy cm) and represents the CTDI vol multiplied by the scan length. This allows calculation of the applied radiation dose to a scanned volume and extends the CTDI vol from a single rotation to the entire scanned volume [14]. CTDI vol and DLP are displayed on the consoles of all modern CT scanners after the technologist has performed the localizer scans, but before the start of the CTC scan series.…”

Section: Radiation Dose Metricsmentioning

confidence: 99%

“…Additional novel iterative reconstruction techniques are being released such as model-based iterative reconstruction (MBIR) by General Electric Healthcare, which is considered a pure iterative reconstruction algorithm that does not require blending with FBP and can achieve up to 80 % dose reduction. Significant computing power is still needed for MBIR, and reconstruction times are longer, taking approximately 20 min per case [14].…”

Section: Iterative Reconstructionmentioning

confidence: 99%

Applying Dose Reduction to CT Colonography

2013

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There is increasing awareness of the radiation dose delivered to patients using computed tomography (CT). It is important to properly manage the radiation dose when performing CT colonography (CTC) for colorectal cancer screening since the test may be repeated several times over the lifetime of the individual. There must be a balance of the overall benefit of screening CTC versus any theoretical risk of radiation. Technically there must also be a balance of radiation dose with image quality. Efforts continue to lower the radiation dose as much as possible while maintaining diagnostic accuracy for CTC in conjunction with overall national efforts by professional organizations, providers of medical imaging services, and equipment manufacturers. This article reviews the strategies that may be used to reduce the radiation dose for CTC including practical methods, modifications of specific CT parameters, and the use of new iterative reconstruction techniques.

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“…In case of a CT examination, the use of a low radiation dose is mandatory (ALARA principle) as X-rays can have negative effects on the organism. Gaining prior knowledge about the patient and its anatomy can help to minimize the radiation dose [1]. E.g.…”

Section: Introductionmentioning

confidence: 99%

Concept of a multi sensor and freely configurable patient table for CT applications

Leopold

Hoffmann

Klemens

et al. 2018

Current Directions in Biomedical Engineering

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Conventional computed tomography (CT) systems are encapsulated in hardware and software. Integration of further imaging modalities and sensors which can acquire prior knowledge for dose saving image acquisition and reconstruction techniques are barely possible. Within the scope of our research project, an open interface and freely configurable CT system is now being developed. The integration of further modalities and sensors into this system is a main target. A subproject deals with a multi sensor patient table, which provides additional information through integrated sensors. In particular, force sensors are installed inside the patient table to determine the patient’s mass. This value can be used to specify the required tube voltage, so that a more precise setting can be made in comparison to today‘s clinical practice. Studys show that a more precise kVp estimation can significantly reduce patient dose. Sensors for the monitoring of respiration and pulse are also integrated into the setup of the patient table. On the one hand, these are designed to encourage the patients to minimize disturbing movements and on the other hand to generate trigger signals for the examination. In addition to the sensor concept of the table, a position control system for vertical and horizontal movement of the table is integrated. The position of the table can be adjusted using different input devices so that a fast and intuitive handling of the table movement can be achieved for standard diagnostic and CT guided interventional procedures. The communication between all sensors, actors and the CT ist realized via the Robot Operating System (ROS) framework.

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Strategies for Radiation Dose Optimization

Cited by 17 publications

References 49 publications

Untitled

Untitled

Applying Dose Reduction to CT Colonography

Concept of a multi sensor and freely configurable patient table for CT applications

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