New concept in echocardiography: harmonic imaging of tissue without use of contrast agent

Caidahl, Kenneth; Kazzam, Elsadig; Lidberg, Jonas; Neumann-Andersen, G.; Nordanstig, Joakim; Rantapää-Dahlqvist, Solbritt; A, Waldenström; Wikh, Ronny

doi:10.1016/s0140-6736(98)02361-7

Cited by 128 publications

(56 citation statements)

References 16 publications

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“…Technology development will hopefully advance ultrasound image quality. An improvement was obtained with the introduction of tissue harmonic imaging (Caidahl et al, 1998). Several research groups are working on techniques for further improving quality of ultrasound images, such as suppression of reverberation and aberration correction.…”

Section: Discussionmentioning

confidence: 99%

Ultrasound in Abdominal Aortic Aneurysm

Brekken¹,

Dahl²,

Hernes³

2011

Diagnosis, Screening and Treatment of Abdominal, Thoracoabdominal and Thoracic Aortic Aneurysms

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Section: Discussionmentioning

confidence: 99%

Ultrasound in Abdominal Aortic Aneurysm

Brekken¹,

Dahl²,

Hernes³

2011

Diagnosis, Screening and Treatment of Abdominal, Thoracoabdominal and Thoracic Aortic Aneurysms

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“…In the present study, the Doppler echocardiographic assessment of AVA by the continuous equation, that is widely applied in clinical practice and is superior to the method of invasive catheterization, was performed with the exact parallel orientation of the Doppler beam with the high-velocity aortic jets. 11,12,[27][28][29][30] The planimetric approach by 2-DE did not perform as a reference standard because of poor visualizations of degenerated AV. However, the same approach by 16-slice MDCT could detect a tissue border line of valve leaflets.…”

Section: Discussionmentioning

confidence: 99%

“…For diagnosing and evaluating the AVA by 2-dimensional echocardiography (DE) in patients with AS, the planimetric method without disturbed visualizations and the Doppler approach using an adequate angle of ultrasound beam are highly sensitive. [10][11][12][13] The high spatial and temporal resolution of 16-slice MDCT might allow for detailed images of the AV orifice and measurements of the AVA.…”

mentioning

confidence: 99%

The Simultaneous Assessment of Aortic Valve Area and Coronary Artery Stenosis Using 16-Slice Multidetector-Row Computed Tomography in Patients With Aortic StenosisComparison With Echocardiography

Tanaka

Shimada

Yoshida

et al. 2007

Circ J

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he method of 16-slice multidetector-row computed tomography (16-slice MDCT) has recently been introduced for the non-invasive visualization of arteriosclerotic coronary arteries, abnormal cardiac structures and myocardial properties. [1][2][3][4][5][6][7] Single-center studies have reported sensitivities between 72% and 95% and specificities between 86% and 97% for the detection of obstructive coronary lesions using 16-slice MDCT. 1-4 Multidetector-row computed tomography (MDCT) is a promising non-invasive technique for the detection of obstructive epicardial coronary artery disease (CAD).In industrialized countries the most frequent cause of aortic stenosis (AS) is degenerative changes of valve leaflets, such as the congenital bicuspid aortic valve (AV) 8 and atherosclerotic valves. These changes frequently occur in elderly patients, who are also at high risk for CAD. Severe AS (an AV area (AVA) of less than 1.0 cm 2 ) accompanied by CAD presents problems for surgical decision-making in Circulation Journal Vol.71, October 2007 whether AV replacement (AVR) should be performed with coronary artery bypass graft (CABG) surgery. 9 Transthoracic echocardiography (TTE) is an important and non-invasive method for assessing the significance of cardiac murmurs, which are derived from diseased heart valves. For diagnosing and evaluating the AVA by 2-dimensional echocardiography (DE) in patients with AS, the planimetric method without disturbed visualizations and the Doppler approach using an adequate angle of ultrasound beam are highly sensitive. [10][11][12][13] The high spatial and temporal resolution of 16-slice MDCT might allow for detailed images of the AV orifice and measurements of the AVA.The purpose of the present study is to investigate whether the AVA in patients with AS assessed by 16-slice MDCT corresponds to that by echocardiographic assessment and to evaluate simultaneously the clinical accuracy in detecting CAD with 16-slice MDCT. Methods SubjectsThe study population consisted of 29 consecutive patients (15 male, 14 female; mean age 71.0±10.6 years) who underwent TTE for the evaluation of AS. All subjects were examined by 16-slice MDCT for calculating AVA within a 1-week period following 2-DE. No change in the patients' provide for non-invasive assessment of not only coronary artery disease (CAD), but also myocardial properties and the anatomy of the whole heart. The purpose of the present study was to investigate whether the aortic valve area (AVA) in patients with aortic stenosis (AS) assessed by 16-slice MDCT corresponds to echocardiographic assessment and to evaluate simultaneously the clinical accuracy in detecting CAD with 16-slice MDCT. Methods and ResultsThe AVA of 29 consecutive AS patients with transthoracic echocardiography (TTE) and 16-slice MDCT were analyzed. The AVA was estimated by means of the continuity equation method in 2-dimensional echocardiography (DE) and the quantitative planimetric method after multi-planar reformation in 16-slice MDCT. Concomitantly, the severity of the corona...

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“…For diagnosing and evaluating the AVA by 2-dimensional echocardiography in patients with AS, the planimetric method without disturbed visualizations and the Doppler approach using an adequate angle of ultrasound beam are highly sensitive (Caidahl et al, 1998;Okura et al, 1997). The high spatial and temporal resolution of MSCT might allow for detailed images of the AV orifice and measurements of the AVA.…”

Section: Assessment Of Aortic Valve Areamentioning

confidence: 99%