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Journal Cover Ultrasonic Imaging
   Journal TOC RSS feeds Export to Zotero [3 followers]  Follow    
   Hybrid Journal Hybrid journal (It can contain Open Access articles)
     ISSN (Print) 0161-7346 - ISSN (Online) 1096-0910
     Published by Sage Publications Homepage  [738 journals]   [SJR: 0.651]   [H-I: 33]
  • In Memoriam
    • Pages: E1 - E1
      PubDate: 2014-07-11T02:10:08-07:00
      DOI: 10.1177/0161734614544923|hwp:resource-id:spuix;36/3/E1
      Issue No: Vol. 36, No. 3 (2014)
       
  • Computer-Aided Strain Evaluation for Acoustic Radiation Force Impulse
           Imaging of Breast Masses
    • Authors: Lo, C.-M; Chen, Y.-P, Chang, Y.-C, Lo, C, Huang, C.-S, Chang, R.-F.
      Pages: 151 - 166
      Abstract: Acoustic radiation force impulse (ARFI) is a newly developed elastography technique that uses acoustic radiation force to provide additional stiffness information to conventional sonography. A computer-aided diagnosis (CAD) system was proposed to automatically specify the tumor boundaries in ARFI images and quantify the statistical stiffness information to reduce user dependence. The level-set segmentation was used to delineate tumor boundaries in B-mode images, and the segmented boundaries were then mapped to the corresponding area in ARFI images for a gray-scale calculation. A total of 61 benign and 51 malignant tumors were evaluated in the experiment. The CAD system based on the proposed ARFI features achieved an accuracy of 80% (90/112), a sensitivity of 80% (41/51), and a specificity of 80% (49/61), which is significantly better than that of the quantitative B-mode features (p < 0.05). The ARFI features were further combined with the B-mode features, including shape and texture features, to further improve performance (area under the curve [AUC], 0.90 vs. 0.86). In conclusion, the CAD system based on the proposed ARFI features is a promising and efficient diagnostic method.
      PubDate: 2014-06-03T03:43:35-07:00
      DOI: 10.1177/0161734613520599|hwp:resource-id:spuix;36/3/151
      Issue No: Vol. 36, No. 3 (2014)
       
  • Double Ring Array Catheter for In Vivo Real-Time 3D Ultrasound
    • Authors: Smith, S. W; Gardea, P, Patel, V, Douglas, S. J, Wolf, P. D.
      Pages: 167 - 176
      Abstract: We developed new forward-viewing matrix transducers consisting of double ring arrays of 118 total PZT elements integrated into catheters used to deploy medical interventional devices. Our goal is 3D ultrasound guidance of medical device implantation to reduce x-ray fluoroscopy exposure. The double ring arrays were fabricated on inner and outer custom polyimide flexible circuits with inter-element spacing of 0.20 mm and then wrapped around an 11 French (Fr) catheter to produce a 15 Fr catheter (outer diameter [O.D.]). We used a braided cabling technology to connect the elements to the Volumetrics Medical Imaging (VMI) real-time 3D ultrasound scanner. Transducer performance yielded an average –6 dB fractional bandwidth of 49% ± 11% centered at 4.4 MHz for 118 elements. Real-time 3D cardiac scans of the in vivo pig model yielded good image quality including en face views of the tricuspid valve and real-time 3D guidance of an endo-myocardial biopsy catheter introduced into the left ventricle.
      PubDate: 2014-06-03T03:43:35-07:00
      DOI: 10.1177/0161734614523738|hwp:master-id:spuix;0161734614523738
      Issue No: Vol. 36, No. 3 (2014)
       
  • Color Doppler Evaluation of the Retrobulbar Hemodynamic Changes in Chronic
           Obstructive Pulmonary Disease: COPD and Retrobulbar Hemodynamic Changes
    • Authors: Celik, C; Tokgoz, O, Şerifoğlu, l, Tor, M, Alpay, A, Erdem, Z.
      Pages: 177 - 186
      Abstract: The aim of this study was to evaluate the hemodynamic changes in the extraocular orbital vessels of the patients with chronic obstructive pulmonary disease (COPD), using color Doppler ultrasonography, and to compare the results with those of healthy control subjects. The control group consisted of 35 healthy subjects who had no systemic problems, while the study group consisted of 60 patients with the diagnosis of COPD. Patients with COPD were grouped according to the Global Initiative for Chronic Obstructive Lung Disease (GOLD). Twenty patients of stage 1 COPD (mild airflow limitation), stage 2 COPD (moderate airflow limitation), or stage 3 COPD (severe airflow limitation) were included in the groups 1, 2, and 3, respectively. Measurements were performed in both eyes of each participant. Peak systolic velocity (PSV), end-diastolic velocity (EDV), resistance index (RI), and pulsatility index (PI) were measured in the ophthalmic artery (OA), central retinal artery (CRA), and posterior ciliary artery (PCA). The RI and PI measurements of the OA, CRA, and PCA were significantly higher in group 3 when compared to the control group and groups 1 and 2. These significances were not observed when PSV and EDV values were compared. There were also no significant differences between groups 1, 2, and control patients, when mean PSV, EDV, RI, and PI values of all arteries were compared. None of the above parameters showed statistical significance when mean RI, PI, PSV, and EDV were compared between left and right eyes. Severe (stage 3) COPD is associated with impaired retrobulbar hemodynamics. Increased hypoxia and vascular mediators may be suggested in etiology.
      PubDate: 2014-06-03T03:43:35-07:00
      DOI: 10.1177/0161734613514391|hwp:resource-id:spuix;36/3/177
      Issue No: Vol. 36, No. 3 (2014)
       
  • 39th International Symposium on Ultrasonic Imaging and Tissue
           Characterization
    • Authors: Linzer; M.
      Pages: 187 - 233
      PubDate: 2014-06-03T03:43:35-07:00
      DOI: 10.1177/0161734614535164|hwp:resource-id:spuix;36/3/187
      Issue No: Vol. 36, No. 3 (2014)
       
 
 
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