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[PDF] Top 20 Low kilovoltage cardiac dual-source CT: attenuation, noise, and radiation dose

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Low kilovoltage cardiac dual-source CT: attenuation, noise, and radiation dose

Low kilovoltage cardiac dual-source CT: attenuation, noise, and radiation dose

... 2008 Low kilovoltage cardiac dual-source CT: attenuation, noise, and radiation dose Abstract The purpose of this study was to investigate the ... Voir le document complet

9

Radiation dose of cardiac computed tomography - what has been achieved and what needs to be done

Radiation dose of cardiac computed tomography - what has been achieved and what needs to be done

... Ertel and colleagues [ 1 ] described a spiral computed tomography (CT) technique employing a very high table feed (and pitch) for a fast data acquisition of the ...first-generation ... Voir le document complet

5

Image quality and radiation dose comparison of prospectively triggered low-dose CCTA: 128-slice dual-source high-pitch spiral versus 64-slice single-source sequential acquisition

Image quality and radiation dose comparison of prospectively triggered low-dose CCTA: 128-slice dual-source high-pitch spiral versus 64-slice single-source sequential acquisition

... for low-dose CCTA) ...single cardiac cycle, a very high- pitch of [3 is necessary even when using a dual- source CT (DSCT) scanner equipped with two 128-slice acquisition ...very ... Voir le document complet

9

Radiation dose estimates in dual-source computed tomography coronary angiography

Radiation dose estimates in dual-source computed tomography coronary angiography

... for CT protocols may underestimate or overestimate the true radiation exposure to the patient [ 27 ...delivered dose within a ...describe and compare radiation doses received from ... Voir le document complet

8

High-pitch coronary CT angiography with third generation dual-source CT: limits of heart rate

High-pitch coronary CT angiography with third generation dual-source CT: limits of heart rate

... the radiation dose of coronary CTA ...16], and use of the noise reducing properties with iterative reconstruction algorithms [4, 7, ...coronary CT angiography at low ... Voir le document complet

7

Radiation dose values for various coronary calcium scoring protocols in dual-source CT

Radiation dose values for various coronary calcium scoring protocols in dual-source CT

... of attenuation-based tube current for CS leads to a more balanced image noise and reduces the radiation dose as compared to a fixed tube ...the dose usage can be optimized ... Voir le document complet

9

Prospective randomised comparison of diagnostic confidence and image quality with normal-dose and low-dose CT pulmonary angiography at various body weights

Prospective randomised comparison of diagnostic confidence and image quality with normal-dose and low-dose CT pulmonary angiography at various body weights

... increased noise; 2=CM related, including too late or too early bolus, rapid CM dilution due to low CM flow, high cardiac output or shunt; 3=artefacts (respiratory, movement or metal- lic); ... Voir le document complet

10

Delayed enhancement imaging of myocardial viability: low-dose high-pitch CT versus MRI

Delayed enhancement imaging of myocardial viability: low-dose high-pitch CT versus MRI

... Acquisition and Image Reconstruction All MRI was performed on a ...dedicated cardiac phased-array receiver coils with five elements used for signal ...clinical cardiac MRI protocol including cine ... Voir le document complet

9

Feasibility of low-dose coronary CT angiography: first experience with prospective ECG-gating

Feasibility of low-dose coronary CT angiography: first experience with prospective ECG-gating

... routine, radiation exposure has remained an issue of ...estimated radiation doses of up to ...5 and down to ...recent dual source CTCA study using two different ECG-pulsing protocols ... Voir le document complet

7

Acute appendicitis: prospective evaluation of a diagnostic algorithm integrating ultrasound and low-dose CT to reduce the need of standard CT

Acute appendicitis: prospective evaluation of a diagnostic algorithm integrating ultrasound and low-dose CT to reduce the need of standard CT

... ultrasound, and that LDCT had therefore to deal with more subtle cases ...the CT table, so that standard CT could be performed immediately if ...prospective and retrospective LDCT ... Voir le document complet

9

Ultra-high-resolution dual-source CT for forensic dental visualization—discrimination of ceramic and composite fillings

Ultra-high-resolution dual-source CT for forensic dental visualization—discrimination of ceramic and composite fillings

... by CT. Thereby, the advantages of an easy, fast and observer independent postmortem documen- tation of the dentition can be used for the purpose of forensic identification as it allows for a very quick ... Voir le document complet

7

Radiation dose in vertebroplasty

Radiation dose in vertebroplasty

... apron measurements. It is important to reduce this exposure of the hands by reducing the time the hands are in the radiation field or using devices which can be manipulated with the hands outside it. During verteb- ... Voir le document complet

3

Main pulmonary artery diameter from attenuation correction CT scans in cardiac SPECT accurately predicts pulmonary hypertension

Main pulmonary artery diameter from attenuation correction CT scans in cardiac SPECT accurately predicts pulmonary hypertension

... echocardiography and CT examinations were not per- formed on the same day, as the pulmonary pressure may be subject to changes over ...results and may support that MPA enlargement not only reflects ... Voir le document complet

8

CT dose reduction in children

CT dose reduction in children

... filtration, and slightly differing efficiencies of the detectors and the data acquisition system, factors that usually cannot be influenced by the radiologist or ...energies and therefore reducing ... Voir le document complet

11

High-pitch dual-source CT coronary angiography: systolic data acquisition at high heart rates

High-pitch dual-source CT coronary angiography: systolic data acquisition at high heart rates

... contrast-enhanced CT were nephr- opathy with a serum creatinine level above 150 μmol/l, known hypersensitivity to iodine-containing contrast media, untreated hyperthyroidism and ...all CT studies ... Voir le document complet

7

On seismic ambient noise cross-correlation and surface-wave attenuation

On seismic ambient noise cross-correlation and surface-wave attenuation

... Figure 3: Five examples of power spectral density < |s(x, ω)| 2 > x , computed for five consec- utive six-hour long intervals. The computation is repeated for each season, with panels a, b, c and d showing ... Voir le document complet

35

CT radiation dose in children: a survey to establish age-based diagnostic reference levels in Switzerland

CT radiation dose in children: a survey to establish age-based diagnostic reference levels in Switzerland

... in dose (appropriate image quality requirements for a given indication, number of acquisition phases that are clinically relevant, ...for CT examinations of the brain, the chest and the abdomen ... Voir le document complet

7

Source and processing effects on noise correlations

Source and processing effects on noise correlations

... heterogeneous noise sources and seismic processing on noise correlation measurements and their sensitivity to Earth ...simulations and adjoint techniques, we calculate interstation ... Voir le document complet

PET attenuation coefficients from CT images: experimental evaluation of the transformation of CT into PET 511-keV attenuation coefficients

PET attenuation coefficients from CT images: experimental evaluation of the transformation of CT into PET 511-keV attenuation coefficients

... with CT-based attenuation correc- tion owing to the limited spatial resolution of ...PET attenuation would be underestimat- ed based on the CT measurement of the Teflon insert in the NEMA ... Voir le document complet

6

Improving abdomen tumor low-dose CT images using a fast dictionary learning based processing.

Improving abdomen tumor low-dose CT images using a fast dictionary learning based processing.

... suppress noise and ...their low computation cost and their easy implementation in most current CT systems with no built-in low dose ...(standard dose CT) ... Voir le document complet

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