CT Angiography: Current Technology and Clinical Use

Kumamaru, Kanako K.; Hoppel, Bernice E.; Mather, Richard T.; Rybicki, Frank J.

doi:10.1016/j.rcl.2010.02.006

Cited by 96 publications

(56 citation statements)

References 108 publications

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“…CT angiography (CTA) is an excellent technique in which ECG gating and administration of intravenous contrast material are used to visualize and measure calcified areas of coronary plaque and luminal stenosis. 34 Although considered inferior to cardiac catheterization, CTA can provide visualization of small, tortuous arteries (as small as 1 mm in diameter). 34 Coronary CTA can provide valuable information on distribution, severity, morphology, and composition of coronary arterial plaque, along with prognostic information on the severity of both obstructive (>50% blockage) and nonobstructive (<50% blockage) disease.…”

Section: Ct Angiographymentioning

confidence: 99%

“…34 Although considered inferior to cardiac catheterization, CTA can provide visualization of small, tortuous arteries (as small as 1 mm in diameter). 34 Coronary CTA can provide valuable information on distribution, severity, morphology, and composition of coronary arterial plaque, along with prognostic information on the severity of both obstructive (>50% blockage) and nonobstructive (<50% blockage) disease. 28 Stenosis is usually reported as mild (<50% blockage), moderate (50%-60% blockage), and severe (>70% blockage).…”

Section: Ct Angiographymentioning

confidence: 99%

“…28 This method is considered superior to catheter angiography for imaging the aorta and pulmonary arteries. 34 CTA is less useful in evaluating patients who have received percutaneous stents because the stents can cause artifacts. 28 Most CTAs are performed with MDCT because of the high spatial and temporal resolution of the latter.…”

Section: Ct Angiographymentioning

confidence: 99%

“…28 Most CTAs are performed with MDCT because of the high spatial and temporal resolution of the latter. 34 Patients undergoing CTA should have nothing by mouth for 3 hours before the study and should avoid ingesting caffeine 24 hours before the study because caffeine can elevate heart rate. Nurses should assess patients for adequate hydration because dehydration increases the risk for contrast-induced nephropathy (CIN).…”

Section: Ct Angiographymentioning

confidence: 99%

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Cardiac Diagnostic Testing: What Bedside Nurses Need to Know

Ramos

2014

Critical Care Nurse

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Coronary artery disease affects more than 385000 persons annually and continues to be a leading cause of death in the United States. Recently, the number of available noninvasive cardiac diagnostic tests has increased substantially. Nurses should be knowledgeable about available noninvasive cardiac diagnostic testing. The common noninvasive cardiac diagnostic testing procedures used to diagnose coronary heart disease are transthoracic echocardiography, stress testing (exercise, pharmacological, and nuclear), multidetector computed tomography, coronary artery calcium scoring (with electron beam computed tomography or computed tomographic angiography), and cardiac magnetic resonance imaging. Objectives include (1) describing available methods for noninvasive assessment of coronary artery disease, (2) identifying which populations each test is most appropriate for, (3) discussing advantages and limitations of each method of testing, (4) identifying nursing considerations when caring for patients undergoing various methods of testing, and (5) describing outcome findings of various methods.

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Section: Ct Angiographymentioning

confidence: 99%

Section: Ct Angiographymentioning

confidence: 99%

Section: Ct Angiographymentioning

confidence: 99%

Section: Ct Angiographymentioning

confidence: 99%

See 2 more Smart Citations

Cardiac Diagnostic Testing: What Bedside Nurses Need to Know

Ramos

2014

Critical Care Nurse

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“…Nuclear medicine radioisotope ventilation perfusion scans, which were once considered to be the gold standard for detection of pulmonary emboli in conjunction with catheter based pulmonary angiography, have largely been replaced by CT. While other modalities in radiology like nuclear medicine and MR still do have a role to play in detection of emboli in the pulmonaries, this is largely reserved for patients who have a contraindication to CT which involves the use of iodinated contrast medium for examination of the pulmonary vessels [8].…”

Section: Introductionmentioning

confidence: 99%

A Comparison of 100 kVp Versus 120 kVp CTPA Acquisition with Direct Comparisons of Test Bolus and Bolus Tracking at Same and Different Voltages in a Multidetector 64 Slice CT Scanner

Bowden

Kiely

et al. 2017

IJRRT

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This study focused on several aspects of CTPA (Computed Tomography Pulmonary Angiogram) imaging. Primarily to reinforce and substantiate previous research done in the fields of low voltage CTPA acquisition by analysing data obtained during study and seeing what the resultant reduction in kV (Kilovoltage) has on attenuation levels in the pulmonary vessels and whether the decrease in signal intensity adversely affects image quality to any significant degree. To compare bolus tracking and test bolus in CTPA imaging.150 patients were involved and imaged between January 2015 and August 2015. 50 pts were scanned at 100kVp with Test Bolus (Group A). 50 pts were scanned at 120kVp using Bolus Tracking (Group B). 50 patients were scanned at 120kVp using Test Bolus (Control Group). Vascular enhancement, Signal to Noise Ratio (SNR), Contrast to Noise Ratio (CNR), image noise, radiation dosimetry, and contrast use were recorded. Subjective image quality was assessed by two blinded radiologists. All injections took place at a rate of 4ml/sec through an 18 gauge bore cannula sited at the antecubital fossa. Flow rate was kept constant at 4ml/sec throughout the procedure. At both 100 and 120kVp, the injected iodine concentration was the same.The reduction in tube potential resulted in an increase in mean attenuation measured in Hounsfield Units (HU) in the main pulmonary of 25.1% (307.46 to 410.48). Despite a 30% increase in image noise at 100kV there was no significant impact on SNR or CNR values. Radiation dose was considerably decreased by 40% at 100kV with no noteworthy difference in image quality in the images assessed. Use of Test Bolus decreased contrast use by over 25% from the standard amount of 80mls but which had no effect on the attenuation values.

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A Review on Functionally Graded Materials and Structures via Additive Manufacturing: From Multi‐Scale Design to Versatile Functional Properties

Yan

Feng

Liu

et al. 2020

Adv Materials Technologies

313

116

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Functionally graded materials (FGMs) and functionally graded structures (FGSs) are special types of advanced composites with peculiar features and advantages. This article reviews the design criteria of functionally graded additive manufacturing (FGAM), which is capable of fabricating gradient components with versatile functional properties. Conventional geometrical‐based design concepts have limited potential for FGAM and multi‐scale design concepts (from geometrical patterning to microstructural design) are needed to develop gradient components with specific graded properties at different locations. FGMs and FGSs are of great interest to a larger range of industrial sectors and applications including aerospace, automotive, biomedical implants, optoelectronic devices, energy absorbing structures, geological models, and heat exchangers. This review presents an overview of various fabrication ideas and suggestions for future research in terms of design and creation of FGMs and FGSs, benefiting a wide variety of scientific fields.

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CT Angiography: Current Technology and Clinical Use

Cited by 96 publications

References 108 publications

Cardiac Diagnostic Testing: What Bedside Nurses Need to Know

Cardiac Diagnostic Testing: What Bedside Nurses Need to Know

A Comparison of 100 kVp Versus 120 kVp CTPA Acquisition with Direct Comparisons of Test Bolus and Bolus Tracking at Same and Different Voltages in a Multidetector 64 Slice CT Scanner

A Review on Functionally Graded Materials and Structures via Additive Manufacturing: From Multi‐Scale Design to Versatile Functional Properties

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