Results 221 to 230 of about 241,427 (245)

Volume CT Dose Index and Dose-Length Product Displayed during CT: What Good Are They?

Radiology, 2011
The average medical radiation effective dose to the U.S. population in 2006 was estimated at approximately 3.0 mSv, an increase of 600% in a single generation. Computed tomography (CT) alone accounts for approximately half of this medical radiation dose.
Walter, Huda, Fred A, Mettler
openaire   +2 more sources

A Monte Carlo investigation of dose length product of cone beam computed tomography scans

Journal of Radiological Protection, 2020
Abstract The dose length product ( DLP ) provides a measurement related to energy imparted from a computed tomography (CT) scan. The DLP is based on the volume-averaged CT dose index ( CTDI vol
Abdullah Abuhaimed, Colin J Martin
openaire   +2 more sources

Computed Tomography Dose Index and Dose Length Product for Cone-Beam CT: Monte Carlo Simulations of a Commercial System [PDF]

Journal of Applied Clinical Medical Physics, 2011
Dosimetry in kilovoltage cone beam computed tomography (CBCT) is a challenge due to the limitation of physical measurements. To address this, we used a Monte Carlo (MC) method to estimate the CT dose index (CTDI) and the dose length product (DLP) for a commercial CBCT system.
Ehsan Samei, Terry T Yoshizumi, Sangroh Kim   +2 more
exaly   +3 more sources

Dose Is Not Always What It Seems: Where Very Misleading Values Can Result From Volume CT Dose Index and Dose Length Product

Journal of the American College of Radiology, 2014
The volume CT dose index (CTDIvol) and the dose-length product, commonly reported for examinations performed on clinical CT scanners, should not be used as surrogates for patient dose. This is because significant under or overestimates of these actual values can occur when there is a mismatch between the actual body size of the patient and the 16 cm or
J Anthony Seibert, John M. Boone, Sandra L Wootton-Gorges   +2 more
exaly   +3 more sources

MONITORING DOSE–LENGTH PRODUCT IN COMPUTED TOMOGRAPHY OF THE CHEST CONSIDERING SEX AND BODY WEIGHT

Radiation Protection Dosimetry, 2015
Dose-length product (DLP) is widely used as an indicator of the radiation dose in computed tomography. The aim of this study was to investigate the significance of sex and body weight in DLP-based monitoring of the radiation dose. Eight hundred computed tomographies of the chest performed using four different scanners were analysed.
Yusuke, Inoue, Kazunori, Nagahara, Naomichi, Hayakawa, Hironori, Hanawa, Hirofumi, Hata   +4 more
openaire   +2 more sources

A direct method for air kerma-length product measurement in CT for verification of dose display calibrations

Radiation Protection Dosimetry, 2010
The dose display values of computed tomography (CT) devices are used for patient dose estimation and as a tool for optimisation. Therefore, the dose display value accuracy should be verified. In practice, this means doing measurements in the standard phantoms and comparing results with the dose display values.
Katja, Merimaa, Hannu, Järvinen, Mika, Kortesniemi, Juhani, Karppinen   +3 more
openaire   +2 more sources

Lung Cancer Screening CT: Sex-Specific Conversion Factors to Estimate Effective Radiation Dose From Dose-Length Product.

Chest, 2020
Effective dose (ED) is used to understand radiation-related cancer risk of CT scans. Currently, ED for low-dose CT (LDCT) lung cancer screening (LCS) is estimated by multiplying the CT scan-reported dose-length product (DLP) by a DLP-to-ED conversion factor (k-factor) for general chest CT imaging, which does not account for sex.
Stuart L, Cohen, Jason J, Wang, Nicholas, Chan, William, O'Connell, Rakesh, Shah, Pina, Sanelli, Suhail, Raoof   +6 more
openaire   +2 more sources

Software Development for Estimating the Conversion Factor (K-Factor) at Suitable Scan Areas, Relating the Dose Length Product to the Effective Dose

Radiation Protection Dosimetry, 2016
We developed a k-factor-creator software (kFC) that provides the k-factor for CT examination in an arbitrary scan area. It provides the k-factor from the effective dose and dose-length product by Imaging Performance Assessment of CT scanners and CT-EXPO.
Masanao, Kobayashi, Yasuki, Asada, Kosuke, Matsubara, Syouichi, Suzuki, Kichiro, Koshida, Yuta, Matsunaga, Ai, Kawaguchi, Tomonobu, Haba, Hiroshi, Toyama, Ryouichi, Kato   +9 more
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[Evaluation and examination of accuracy for the conversion factors of effective dose per dose-length product].

Nihon Hoshasen Gijutsu Gakkai zasshi, 2013
The purpose of this paper is to reappraise the accuracy of a conversion coefficient (k) reported by International Commission on Radiological Protection Publication 102 Table A.2. The effective doses of the routine head computed tomography (CT), the routine chest CT, the perfusion CT, and the coronary CT were evaluated using the conversion coefficient ...
Masanao, Kobayashi, Tomoko, Ootsuka, Syoichi, Suzuki   +2 more
openaire   +1 more source

SU‐FF‐I‐67: Converting CT Dose Length Product (DLP) to Kerma Area Product (KAP)

Medical Physics, 2009
Purpose: The amount of radiation that is incident on patients in CT is measured using the Dose Length Product (DLP mGy‐cm) which is not commensurate with the corresponding quantity currently used in radiography and fluoroscopy, namely the Kerma Area Product [KAP].
K Ogden, W Huda
openaire   +1 more source