Optimizing abdominal CT dose and image quality with respect to x-ray tube voltage

2004 ◽  
Author(s):  
Walter Huda ◽  
Kent M. Ogden
Keyword(s):  
Image Quality ◽  
Abdominal Ct ◽  
Tube Voltage ◽  
X Ray ◽  
Ct Dose

scholarly journals Correlation of image quality parameters with tube voltage in X-ray dark-field chest radiography: a phantom study

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Andreas P. Sauter ◽  
Jana Andrejewski ◽  
Manuela Frank ◽  
Konstantin Willer ◽  
Julia Herzen ◽  
...  
Keyword(s):  
Image Quality ◽  
Imaging Modality ◽  
Signal Strength ◽  
Dark Field ◽  
Tube Voltage ◽  
X Ray ◽  
Dose Area Product ◽  
Dark Field Imaging ◽  
Field Imaging

AbstractGrating-based X-ray dark-field imaging is a novel imaging modality with enormous technical progress during the last years. It enables the detection of microstructure impairment as in the healthy lung a strong dark-field signal is present due to the high number of air-tissue interfaces. Using the experience from setups for animal imaging, first studies with a human cadaver could be performed recently. Subsequently, the first dark-field scanner for in-vivo chest imaging of humans was developed. In the current study, the optimal tube voltage for dark-field radiography of the thorax in this setup was examined using an anthropomorphic chest phantom. Tube voltages of 50–125 kVp were used while maintaining a constant dose-area-product. The resulting dark-field and attenuation radiographs were evaluated in a reader study as well as objectively in terms of contrast-to-noise ratio and signal strength. We found that the optimum tube voltage for dark-field imaging is 70 kVp as here the most favorable combination of image quality, signal strength, and sharpness is present. At this voltage, a high image quality was perceived in the reader study also for attenuation radiographs, which should be sufficient for routine imaging. The results of this study are fundamental for upcoming patient studies with living humans.

Effect of low tube voltage and low iodine concentration abdominal CT on image quality and radiation dose in children: preliminary study

2019 ◽  
Vol 44 (5) ◽  
pp. 1928-1935 ◽  
Author(s):  
Sun Kyoung You ◽  
Young Hun Choi ◽  
Jung-Eun Cheon ◽  
Woo Sun Kim ◽  
In-One Kim ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Iodine Concentration ◽  
Abdominal Ct ◽  
Tube Voltage ◽  
Low Tube Voltage ◽  
Preliminary Study

scholarly journals A Study on Some Physical Parameters Related to Image Quality and Radiation Safety in Diagnostic Radiology

2011 ◽  
Vol 35 (1) ◽  
pp. 7-17
Author(s):  
Mahfuza Begum ◽  
AS Mollah ◽  
MA Zaman ◽  
M Haq ◽  
AKM Mizanur Rahman
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Exposure Time ◽  
Radiation Safety ◽  
Control Panel ◽  
Physical Parameters ◽  
Output Radiation ◽  
Tube Voltage ◽  
Waiting Room ◽  
X Ray

Different essential radiographic parameters were studied in order to assess radiographic image quality ensuring reduction of radiation exposure in some diagnostic X-ray facilities of Bangladesh. Different parameters for developing and fixing liquid were investigated in order to eliminate improper film processing techniques. General information about intensifying screen, radiography and mammography film was also collected. X-ray tube voltage, output radiation dose and exposure time for diagnostic X-ray machines were tested to achieve significant dose reduction without loss of diagnostic information. It is found that output radiation dose varies in different diagnostic X-ray installations. 70% X-ray installations achieve the recommended value for tube voltage while 87.5% measure the exposure time appropriately. Radiation dose level at patient waiting room, dark room and around control panel was also measured. About 92.5, 85 and 77.5% installations show their results within the acceptance limit at these positions respectively which provide radiation safety for patients, workers and public in diagnostic radiology.DOI: http://dx.doi.org/10.3329/jbas.v35i1.7967Journal of Bangladesh Academy of Sciences, Vol.35, No.1, 7-17, 2011

X-ray tube voltage and image quality in adult and pediatric CT

2006 ◽  
Author(s):  
W. Huda ◽  
K. M. Ogden ◽  
E. M. Scalzetti ◽  
R. L. Lavallee ◽  
E. Samei
Keyword(s):  
Image Quality ◽  
Tube Voltage ◽  
X Ray ◽  
Pediatric Ct

Abdominal CT with Low Tube Voltage: Preliminary Observations about Radiation Dose, Contrast Enhancement, Image Quality, and Noise

Radiology ◽  
2005 ◽  
Vol 237 (3) ◽  
pp. 945-951 ◽  
Author(s):  
Yoshiharu Nakayama ◽  
Kazuo Awai ◽  
Yoshinori Funama ◽  
Masahiro Hatemura ◽  
Masanori Imuta ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Contrast Enhancement ◽  
Abdominal Ct ◽  
Tube Voltage ◽  
Low Tube Voltage

scholarly journals Abdominal CT radiation dose optimization at Siriraj Hospital

2020 ◽  
Vol 21 (2) ◽  
pp. 28-43
Author(s):  
Piyaporn Apisarnthanarak ◽  
Chosita Buranont ◽  
Chulaluck Boonma ◽  
Sureerat Janpanich ◽  
Tarntip Suwatananonthakij ◽  
...  
Keyword(s):  
Image Quality ◽  
Radiation Dose ◽  
Low Dose ◽  
Standard Dose ◽  
Image Noise ◽  
Abdominal Ct ◽  
Low Dose Ct ◽  
Excellent Image Quality ◽  
Ct Dose ◽  
The Mean

OBJECTIVE: To compare radiation dose and image quality between standard dose abdominal CT currently performed at our hospital and new low dose abdominal CT using various percentages (0%, 10%, 20%, and 30%) of Adaptive Statistical Iterative Reconstruction (ASiR). MATERIALS AND METHODS: We prospectively performed low dose abdominal CT (30% reduction of standard tube current) in 119 participants. The low dose CT images were post processed with four parameters (0%, 10%, 20% and 30%) of ASiR. The volume CT dose index (CTDIvol) of standard and low dose CT were compared. Four experienced abdominal radiologists independently assessed the quality of low dose CT with aforementioned ASiR parameters using a 5-point-scale satisfaction score (1 = unacceptable, 2 = poor, 3 = average, 4 = good, and 5 = excellent image quality) by using prior standard dose CT as a reference of excellent image quality (5). Each reader selected the preference ASiR parameter for each participant. The image noise of the liver and the aorta in all 5 (1 prior standard dose and 4 current low dose) image sets was measured.     RESULTS: The mean CTDIvol of low dose CT was significantly lower than of standard dose CT (7.17 ± 0.08 vs 12.02 ±1.61 mGy, p<0.001). The mean satisfaction scores for low dose CT with 0%, 10%, 20% and 30% ASiR were 3.95, 3.99, 3.91 and 3.87, respectively with the ranges of 3 to 5 in all techniques. The preferred ASiR parameters of each participant randomly selected by each reader were varied, depending on the readers’ opinions. The mean image noise of the aorta on standard dose CT and low dose CT with 0%, 10%, 20%, and 30% ASiR was 29.07, 36.97, 33.92, 31.49, and 29.11, respectively, while the mean image noise of the liver was 24.60, 30.21, 28.33, 26.25, and 24.32, respectively. CONCLUSION: Low dose CT with 30% reduction of standard mA had acceptable image quality with significantly reduced radiation dose. The increment of ASiR was helpful in reducing image noise.  

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