Dose reduction in computed tomography by individualized scan protocols

Jangland, Lars; Sanner, E; Persliden, Jan

doi:10.1080/02841850410004814

Cited by 17 publications

(15 citation statements)

References 14 publications

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“…However there are rare indications that require rapid action, such as polytrauma. In this case, dose reduction can be adjusted to noise or body weight [21,23,24]. Tumor staging of nephroblastoma by means of CT has been proven to be reasonable in children [25].…”

Section: Contrast Enhancementmentioning

confidence: 98%

Multidetector CT of the kidney

Coppenrath

Mueller‐Lisse

2006

Eur Radiol

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The technological development of multidetector CT offers new possibilities for better imaging of organic structures that can be used in diagnosis of the kidney. The thinner slices allow a better spatial resolution, and slice fusion allows improved contrast resolution. The isotropic voxel has been realized in the latest 64-channel scanners. The image quality of arbitrarily reconstructed planes has arrived at the image quality of the scan plane. Faster scanning allows studies in different contrast phases, which is helpful for better discrimination of benign or malignant lesions especially in the highly vascularized kidney. Different phases of contrast uptake can be differentiated (arterial, cortico-medullary, nephrographic, and excretory phase). Multidetector CT brings along the risk of increased dose due to thinner slice collimation and overranging phenomena. Indications for CT investigation of the kidney include urolithiasis, tumor diagnosis and staging, renal trauma, and vascular disease. Even in children, special indications for CT of the kidney remain in polytrauma and tumor staging. Multidetector CT of the kidney has become a very valuable tool in urology, but a careful protocol strategy is mandatory.

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Section: Contrast Enhancementmentioning

confidence: 98%

Multidetector CT of the kidney

Coppenrath

Mueller‐Lisse

2006

Eur Radiol

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“…Reporters have suggested different methods of adapting the mAs according to patient size (44,45). When the mAs settings were adapted to patient size, we initially performed measurements of patient height, weight, and circumference as well as performing BMI calculations.…”

Section: Description Of the Changes Made In The Ctu Protocol From 199mentioning

confidence: 99%

“…In the program, start of the scan was set to the top of the kidney in the virtual patient (position 45), and end of the scan was set to the pubic symphysis (position 5) with exception of the CMP in group A where the end of the scan was set to just below the kidney (position 25). In groups D and E, tube current modulation was used.…”

Section: *Care Dose (Siemens Medical Systems Forchheimmentioning

confidence: 99%

Optimization of computed tomography urography protocol, 1997 to 2008: Effects on radiation dose

et al. 2009

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“…This disproportionately increases the contribution of CT dose to the population compared to contribution from other diagnostic techniques (1)(2)(3)(4) . Medical X-rays correspond to a most important tool of manmade irradiation of the population.…”

Section: Introductionmentioning

confidence: 99%

“…The objective of Optimization in CT exposures is to obtain acceptable image quality with minimum dose to the patients; reduction of dose in itself is not the objective of medical exposures. From this point of view in recent times much work has been done on optimization of scanning parameters in routine clinical conditions (8)(9)(10)(11) . The foundation of optimization is the establishment of dose reference levels (DRLs), &irst proposed by the International Commission on Radiation Protection (ICRP) in 1996 (12) and later introduced into European (13) and Irish legislation (14) .…”

Section: Introductionmentioning

confidence: 99%

Establishment of CT diagnostic reference levels in select procedures in South India

Saravanakumar

Vaideki

Govindarajan

et al. 2016

IJRR

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Background: To suggest South India CT diagnos c reference levels (DRLs) by collec ng radia on doses for the most commonly performed CT examina ons. Materials and Methods: A pilot study inves gated the most frequent CT examina ons. 110 CT sites were asked to complete a survey booklet to allow the recording of CT parameters for each of 3 CT examina ons during a 1 year me period. Dose data such Volumetric Computed Tomography Dose Index (CTDI v ) and Dose length product (DLP) on a minimum of 50 average-sized pa ents in each category were recorded to calculate a mean site CTDI vol and DLP value. The rounded 75 th percen le was used to calculate a DRL for each site and the region by compiling all results. Results are compared with interna onal DRL data. Results: Data were collected for 16,500 pa ents. All equipment had mul slice capability (2-256 slices). DRLs are proposed using CTDI vol (mGy) and DLP (mGy.cm) for CT head (47 and 1041 respec vely), CT chest (10 and 445 respec vely), and CT abdomen (12 and 550 respec vely). These values are lower than current DRLs and comparable to other interna onal studies. Wide varia ons in mean doses are noted across the region. Conclusion: Baseline figures for South India CT DRLs are provided on the most frequently performed CT examina ons. It was noted that there was a wide varia on in mean doses among the CT scanners used during diagnosis. The differences in CT doses between CT scanner departments as well as iden cal scanners suggest a large poten al for op miza on of examina ons.Keywords: Com puted tomography (CT), w eighed com puted tomography dose index (CTDI w ), volumetric computed tomography dose index (CTDI v ), dose length product (DLP), dose reference level (DRL).

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Dose reduction in computed tomography by individualized scan protocols

Abstract: Our proposed methods of adjusting the applied tube charge (mAs-value) in relation to the size of the patient can be used on the vast majority of CT systems. The potential for dose reduction is great, especially for small patients.

Cited by 17 publications

References 14 publications

Multidetector CT of the kidney

Multidetector CT of the kidney

Optimization of computed tomography urography protocol, 1997 to 2008: Effects on radiation dose

Establishment of CT diagnostic reference levels in select procedures in South India

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