Strategies for CT Radiation Dose Optimization

Kalra, Mannudeep K.; Maher, Michael M.; Toth, Thomas L.; Hamberg, Leena M.; Blake, Michael A.; Shepard, Jo-Anne O.; Saini, Sanjay

doi:10.1148/radiol.2303021726

Cited by 937 publications

(542 citation statements)

References 65 publications

Supporting

Mentioning

521

Contrasting

Unclassified

Order By: Relevance

“…They demonstrated the high dependence on patient age and size: the effective dose in a newborn was 1.5 times greater than that of an adult for all types of examinations. Other dosimetric aspects associated with paediatric CT regard optimisation procedures [20].…”

Section: Patient Dosementioning

confidence: 99%

CT exposure in adult and paediatric patients: a review of the mechanisms of damage, relative dose and consequent possible risks

et al. 2014

View full text Add to dashboard Cite

An increase has been observed not only in the absolute number of CT examinations but also in the length of coverage and number of scanning phases, with the result that exposure to ionising radiation from CT is becoming an increasingly serious problem. The extent of the problem is not entirely known and cannot be adequately addressed without proper knowledge of all the phases that leads to the effective dose calculation. In light of the growing awareness of the issue of ionising radiation dose and the possible risk for the individual and the population, there is a need for radiologists, medical physicists and radiographers to play an active role in dose management. In this review, the authors try to delineate the problem in a consequential and multifaceted way: radiation-patient interaction, possible mechanisms of damage, main CT dose units, risk and its quantification in the population, with the aim of optimising the acquisition dose without diagnostic drawbacks. For an ''up-to-date'' use of CT, radiologists must know the dose concerns for the single patient and population, and use the CT apparatus with the best dose care; substitute CT with other diagnostic techniques when possible, especially in children; reduce the number/extension of scans and phases, and the dose in single scans and single examinations.

show abstract

Section: Patient Dosementioning

confidence: 99%

CT exposure in adult and paediatric patients: a review of the mechanisms of damage, relative dose and consequent possible risks

et al. 2014

View full text Add to dashboard Cite

show abstract

“…However, radiation dose of their results were increasing while using lower tube voltage. This may be attributable to our use of TCM because in this technique the tube current is automatically adjusted in the x and y planes (angular TCM), the z plane (z‐axis TCM), or both [three‐dimensional (3D) TCM] by inputting an appropriate noise value 2, 21. In the angular‐modulation techniques they automatically adjust the tube current for each projection angle to attenuation of the patients to minimize x‐rays in projection angle.…”

Section: Discussionmentioning

confidence: 99%

“…Computed tomography (CT) is a valuable imaging technique that helps to diagnose and manage some pediatric medical conditions 1, 2, 3. However, CT can result in a high amount of cumulative radiation 4.…”

Section: Introductionmentioning

confidence: 99%

Relationship between the radiation doses at nonenhanced CT studies using different tube voltages and automatic tube current modulation during anthropomorphic phantoms of young children

Masuda

Funama

Kiguchi

et al. 2017

J Applied Clin Med Phys

View full text Add to dashboard Cite

To compare the radiation dose and image noise of nonenhanced CT scans performed at 80, 100, and 120 kVp with tube current modulation (TCM) we used anthropomorphic phantoms of newborn, 1‐year‐old, and 5‐year‐old children. The noise index was set at 12. The image noise in the center of the phantoms at the level of the chest and abdomen was measured within a circumscribed region of interest. We measured the doses in individual tissues or organs with radio‐photoluminescence glass dosimeters for each phantom. Various tissues or organs were assigned and the radiation dose was calculated based on the international commission on radiological protection definition. With TCM the respective radiation dose at tube voltages of 80, 100, and 120 was 29.71, 31.60, and 33.79 mGy for the newborn, 32.00, 36.79, and 39.48 mGy for the 1‐year‐old, and 32.78, 38.11, and 40.85 mGy for the 5‐year‐old phantom. There were no significant differences in the radiation dose among the tube voltages and phantoms (P > 0.05). Our comparison of the radiation dose using anthropomorphic phantoms of young children showed that the radiation dose of nonenhanced CT performed at different tube voltages with TCM was not significantly different.

show abstract

“…It is important to limit the number of CT scans to what is really necessary and to reduce the dosage as much as possible by using a low radiation technique [8,21,38,39]. The technique (KVP, mA, time) is usually determined by the radiologist or the technologist, but concern from the practitioner will help reinforce a safe standard of practice.…”

Section: Computed Tomography (Ct)mentioning

confidence: 99%

Imaging in the Surgical Management of Developmental Dislocation of the Hip

Grissom

Harcke

Thacker

2008

Clinical Orthopaedics &Amp; Related Research

View full text Add to dashboard Cite

Although the use of ultrasound in the diagnosis and early treatment of developmental dysplasia of the hip (DDH) has reduced the number of patients diagnosed late and decreased the number of operative procedures, surgical treatment is still needed in some patients. Late cases continue to occur as a result of missing the screening examination, being normal at initial screening and missing followup. Dysplasia may persist despite appropriate nonoperative or operative treatment. Many of these patients subsequently undergo closed or open reduction and femoral or acetabular reconstruction. Ultrasound of the hips is generally used up to 6 or 8 months of age, during which time the hips are largely cartilaginous, and radiographs after that time when bony development is more complete. Options to supplement ultrasound and radiography include arthrography, computed tomography, and magnetic resonance imaging. Several advances have been made in the imaging of DDH and its complications including acetabular labral pathology and of femoroacetabular impingement (FAI). We review imaging techniques other than ultrasound used in the management of DDH.

show abstract

Strategies for CT Radiation Dose Optimization

Cited by 937 publications

References 65 publications

CT exposure in adult and paediatric patients: a review of the mechanisms of damage, relative dose and consequent possible risks

CT exposure in adult and paediatric patients: a review of the mechanisms of damage, relative dose and consequent possible risks

Relationship between the radiation doses at nonenhanced CT studies using different tube voltages and automatic tube current modulation during anthropomorphic phantoms of young children

Imaging in the Surgical Management of Developmental Dislocation of the Hip

Contact Info

Product

Resources

About