A rapid noninvasive method to visualize ruptured aneurysms in the emergency room: three-dimensional power Doppler imaging

Object. Three-dimensional (3D) power Doppler ultrasonography imaging provides a rapid, noninvasive visualization of ruptured intracranial aneurysms, including their relationship to other vascular structures. Methods. The authors used transcranial 3D power Doppler imaging in the emergency room to examine patients with acute subarachnoid hemorrhage. In all patients, the ruptured aneurysm was rapidly located with 3D power Doppler imaging. Conventional x-ray angiography confirmed both the ultrasonography-based diagnosis and the location of aneurysmal bleeding. Conclusions. These preliminary results indicate that 3D power Doppler imaging is a rapid, noninvasive screening method for the visualization of ruptured aneurysms.

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Power Doppler imaging in detection of surgically induced indirect neoangiogenesis in adult moyamoya disease

Journal of Neurosurgery ◽

10.3171/jns.2005.103.5.0869 ◽

2005 ◽

Vol 103 (5) ◽

pp. 869-872 ◽

Cited By ~ 19

Author(s):

Fabienne Perren ◽

Peter Horn ◽

Peter Vajkoczy ◽

Peter Schmiedek ◽

Stephen Meairs

Keyword(s):

Moyamoya Disease ◽

Power Doppler ◽

Doppler Imaging ◽

Conventional Angiography ◽

Content Type ◽

Power Doppler Imaging ◽

Indirect Revascularization ◽

Adult Moyamoya Disease ◽

Surgically Induced ◽

Fine Print

Object. Moyamoya is a rare, chronic disease that leads to the progressive narrowing and/or occlusion of the distal internal carotid and proximal cerebral arteries. Chronic cerebral ischemia ensues due to insufficient collateral blood supply. One potential treatment consists of the restoration of regional cerebral blood flow by direct or indirect revascularization surgery. The extent of neovascularization, especially in indirect procedures such as encephalomyosynangiosis (EMS), is currently evaluated with conventional angiography. Because this method is invasive and carries some risks, the authors investigated power Doppler imaging as an alternative noninvasive bedside procedure that can be used to assess surgically induced indirect revascularization in adult patients with moyamoya disease. Methods. Twelve symptomatic patients with adult moyamoya disease (seven women and five men, mean age 38 ± 17 years) underwent combined (direct and indirect) revascularization. They were then examined using conventional angiography and power Doppler imaging to assess the extent of revascularization within 120 days postsurgery. According to the number of intracranial vessels demonstrating opacification on conventional angiography and power Doppler imaging studies, EMS was graded as follows: 1, absent (0 vessels); 2, moderate (one—four vessels); and 3, extensive (> four vessels) for both methods. Examiners were blinded to the classification results for the procedure that they did not grade. All 24 hemispheres were examined. The visual grading of EMS revealed a highly significant agreement between conventional angiography and power Doppler imaging (Spearman rank coefficient, r = 0.92; p < 0.001) and there was 100% agreement of patency of the bypass between the direct and indirect methods. Conclusions. The authors found excellent agreement between the two methods. Therefore, power Doppler imaging is a valid noninvasive alternative to carotid artery angiography in evaluating direct and indirect revascularization.

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The Contribution of Three-Dimensional Power Doppler Imaging in the Preoperative Assessment of Breast Tumors: A Preliminary Report

Obstetrics and Gynecology International ◽

10.1155/2009/530579 ◽

2009 ◽

Vol 2009 ◽

pp. 1-8 ◽

Cited By ~ 10

Author(s):

K. Kalmantis ◽

C. Dimitrakakis ◽

Ch. Koumpis ◽

A. Tsigginou ◽

N. Papantoniou ◽

...

Keyword(s):

Power Doppler ◽

Three Dimensional ◽

Morphological Characteristics ◽

Preoperative Assessment ◽

Breast Cancer Diagnosis ◽

Doppler Imaging ◽

Breast Cancers ◽

3D Power Doppler ◽

Power Doppler Imaging ◽

3D Ultrasonography

Purpose. The aim of this study was to determine the value of 3D and 3D Power Doppler sonography in the detection of tumor malignancy in breast lesions and to find new diagnostic criteria for differential diagnosis.Methods. One hundred and twenty five women with clinically or mammographically suspicious findings were referred for 3D Power Doppler ultrasound prior to surgery. Histological diagnosis was conducted after surgery and compared with ultrasound findings. Sonographic criteria used for breast cancer diagnosis were based on a system that included morphological characteristics and criteria of the vascular pattern of a breast mass by Power Doppler imaging.Results. Seventy-two lesions were histopathologically diagnosed as benign and 53 tumors as malignant. Three-dimensional ultrasound identified 49 out of 53 histologically confirmed breast cancers resulting in a sensitivity of 92.4% and a specificity of 86.1% in diagnosing breast malignancy (PPV: 0.83, NPV:0.94).Conclusions. 3D ultrasonography is a valuable tool in identifying preoperatively the possibility of a tumor to be malignant.

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