Radiation Dose Reduction in Chest CT: A Review

Kubo, Takeshi; Lin, Pei‐Jan Paul; Stiller, Wolfram; Takahashi, Masaya; Kauczor, Hans Ulrich; Ohno, Yoshiharu; Hatabu, Hiroto

doi:10.2214/ajr.07.2556

Cited by 222 publications

(129 citation statements)

References 84 publications

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“…The reconstructed slice thickness should match the collimation and the reconstruction increment and should be 80% of the slice thickness or less. In general, a tube voltage of 120 kV together with a tube current between 50-150 mAs is recommended (8).…”

Section: Technical Aspectsmentioning

confidence: 99%

Imaging phenotypes of chronic obstructive pulmonary disease

Ley‐Zaporozhan¹,

Beek²

2010

Magnetic Resonance Imaging

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Chronic obstructive pulmonary disease (COPD) is one of the leading causes of morbidity and mortality worldwide. COPD is defined by irreversible airflow obstruction. It is a heterogeneous disease affecting the airways and/or the parenchyma with different severity during the course of the disease. These different aspects of COPD can be addressed by imaging using a combination of morphological and functional techniques. Computed tomography (CT) is the technique of choice for morphological imaging of the lung parenchyma and airways. This morphological information is to be accomplished by functional information about ventilation and perfusion, mainly provided by magnetic resonance imaging (MRI). The comprehensive diagnostic possibilities of CT complemented by MRI will allow for a more sensitive detection, phenotype-driven characterization, and dedicated therapy monitoring of the disease.

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Section: Technical Aspectsmentioning

confidence: 99%

Imaging phenotypes of chronic obstructive pulmonary disease

Ley‐Zaporozhan¹,

Beek²

2010

Magnetic Resonance Imaging

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“…Over the last decade, chest radiologists have considerably modified their CTprotocols and thus, reduced the radiation dose distributed from CT examinations with no loss in the diagnostic quality of examinations [1][2][3]. These changes started with the understanding that high-quality examinations, devoid of perceptible image noise, could be obtained at lower doses by selecting weight-adapted protocols and/or using automatic tube current modulation systems [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Chest computed tomography using iterative reconstruction vs filtered back projection (Part 2): image quality of low-dose CT examinations in 80 patients

et al. 2010

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Purpose To evaluate the image quality of an iterative reconstruction algorithm (IRIS) in low-dose chest CT in comparison with standard-dose filtered back projection (FBP) CT. Materials and methods Eighty consecutive patients referred for a follow-up chest CT examination of the chest, underwent a low-dose CT examination (Group 2) in similar technical conditions to those of the initial examination, (Group 1) except for the milliamperage selection and the replacement of regular FBP reconstruction by iterative reconstructions using three (Group 2a) and five iterations (Group 2b). Results Despite a mean decrease of 35.5% in the doselength-product, there was no statistically significant difference between Group 2a and Group 1 in the objective noise, signal-to-noise (SNR) and contrast-to-noise (CNR) ratios and distribution of the overall image quality scores. Compared to Group 1, objective image noise in Group 2b was significantly reduced with increased SNR and CNR and a trend towards improved image quality. Conclusion Iterative reconstructions using three iterations provide similar image quality compared with the conventionally used FBP reconstruction at 35% less dose, thus enabling dose reduction without loss of diagnostic information. According to our preliminary results, even higher dose reductions than 35% may be feasible by using more than three iterations.

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“…Facing the challenge of providing diagnostic image quality at the lowest radiation dose, the radiological community has modified chest CT protocols at the pace of new technology implementations aiming to reduce radiation exposure, such as anatomical tube current modulation, ECG-controlled tube current modulation or dynamically adjustable pre-patient collimation of the X-ray beam in the z-axis direction [9,10]. Simple dose saving behaviours have also been introduced in the radiologists' daily practice, such as the adjustment of the CT parameters selected at the console, further optimized when individually-adapted, which can be associated with automatic tube current modulation systems [11,12]. More recently, another option to save dose is the use of iterative reconstruction techniques [13].This two-part study was initiated to evaluate the performance of a recently introduced iterative reconstruction technique (Iterative Reconstruction in Image Space IRIS) [14].…”

Section: Introductionmentioning

confidence: 99%