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Search Results: 1 - 10 of 401442 matches for " Ghafouri M "
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Color Doppler Ultrasonography in Evaluation of the Postoperative Penis
M. Ghafouri
Iranian Journal of Radiology , 2005,
Abstract: Introduction & Background: Color Doppler ultrasonography (US) is the imaging modality of choice in patients with penile diseases. Ultrasonography has a well-established role in evaluating erectile dysfunction as well as penile trauma, scarring, deformity, and tumors. The normal postoperative anatomy and the pathologic changes that can occur in cases of surgical complications can be successfully investigated with US. Gray Scale (B Mode) and Color Doppler US clearly depicts the normal penile anatomy and postoperative changes. It is also effective in evaluating surgery-related complications and determining the causes of erectile dysfunction and other un-satisfactory long term results. Color Doppler US is the imaging modality of choice in evaluating patients who have undergone penile surgery. Here we aim to illustrate the gray-scale and color Doppler US appearance of normal penis, discuss the main penile surgical procedures, recognize the typical US features of the postopera-tive penis, and describe the US appearance of various postoperative complications. Patients & Methods: This article is the result of evaluating 42 patients referred to the radiology ward of Hashemi-Nejad Hospital, Iran University of Medical Sciences in the years 2002 to 2005 for ultrasonography of penis to assess the penis after different penile surgical procedures (urethral surgery, correction of penile mal-formations, prosthesis implantation, vascular surgery for impotence, surgical management of priapism, phallic reconstruction). The US apparatus was Esaote Technos MP, with linear multifrequency 5-8.5MHz. transducer. Results: A variety of early and late surgical complications could be identified, such as extraalbugineal patho-logic fluid collections and fibrosis. Moreover, Doppler US of the penile vessels and vascular anastomoses fol-lowing revascularization allowed direct evaluation of flow characteristics, shunt patency, and venous en-gorgement. Color Doppler US was also particularly helpful in determining the causes of erectile dysfunction and other unsatisfactory long-term results following penile surgery. Conclusion: Our findings indicate that color Doppler US is the imaging modality of choice in evaluating pa-tients who have undergone penile surgery because it clearly depicts normal penile anatomy and postoperative changes.
3D Reconstruction in Spiral Multislice CT Scans
M. Ghafouri
Iranian Journal of Radiology , 2005,
Abstract: Introduction & Background: The rapid development of spiral (helical) computed tomography (CT) has resulted in exciting new applications for CT. One of these applications, three-dimensional (3D) CT with volume ren-dering, is now a major area of clinical and academic interest. One of the greatest advantages of spiral CT with 3D volume rendering is that it provides all the necessary information in a single radiologic study (and there-fore at the lowest possible price) in cases that previously required two or more studies. Three-dimensional vol-ume rendering generates clinically accurate and immediately available images from the full CT data set with-out extensive editing. It allows the radiologist and clinician to address specific questions concerning patient care by interactively exploring different aspects of the data set. Three-dimensional images integrate a series of axial CT sections into a form that is often easier to interpret than the sections themselves and can be made to appear similar to other more familiar images such as catheter angiograms. The data are organized into a 3D matrix of volume elements (voxels). The screen of the computer monitor is a 2D-surface composed of discrete picture elements (pixels). Presenting what is stored in memory (ie, floating within the monitor) on a 2D-screen is a challenge, but it is the very problem that 3D reconstruc-tion software has creatively solved. Voxel selection is usually accomplished by projecting lines (rays) through the data set that correspond to the pixel matrix of the desired 2D image. Differences in the images produced with various 3D rendering techniques are the result of variations in how voxels are selected and weighted. In this article, I compare 3D volume rendering of spiral CT data with other rendering techniques (shaded surface display, maximum intensity projection) and present a brief history of 3D volume rendering and discuss the im-plementation of this promising technology in terms of strategies for volume data management, selection of rendering parameters, and features of data display. In addition, I present recent research on the accuracy of the technique in specific medical applications and discuss a number of current clinical applications of 3D volume rendering of spiral CT data.
NERVE BLOCKING (PAIN CONTROL) AFTER THORACOTOMY WITH BUPIVACAINE:EPIDURAL VS INTERCOSTAL
A GHAFOURI,M SAGHAEI
Journal of Research in Medical Sciences , 2001,
Abstract: Introduction. Use of analgesics is an evitable and necessary part of thoracic surgery. This study was designed to compare analgesic effects of persistent thoracic epidural anesthesia versus persistent intercostal nerve block and determine their role in opioid need after thoracotomy. Methods. 116 patients above 20 years old who were candidate for thoracotomy through either posterolateral or thoracoabdominal incision were situatedin one of three group for pain relief. For the first group, pain relieved by petidine and pentazosin. In 2nd group, pain relived by thoracic epidural anesthesia with bupivacaine catheters which were inserted between costal and plural space. In 3rd group, bupivacaine was introduced through 3rd and 4th intercostal space by catheter (2 mg/kg in devided doses). Pain was meseared by visual analogue scale and quantified by surgical residents through a method bupivacaine was injected. If Bupivacaine did not relieve pain, then opioid was used as adjuvant. Results. The study showed that epidural group needed less opioids and had more cooperation in comparison with two other group. The intercostal group complained of pain at chest tube site. Discussion. In thoracotomized patients, pain control is more effective via epidural anesthesia in turns of opioid side effects, expenses and patient comfort.
IP Transmission Over OCDMA-LAN
M. M. Karbassian,H. Ghafouri-Shiraz
Lecture Notes in Engineering and Computer Science , 2009,
Abstract:
Hybrid F-PolSK Transceiver Architecture for CDMA-PON
M. M. Karbassian,H. Ghafouri-Shiraz
Lecture Notes in Engineering and Computer Science , 2008,
Abstract:
Phase-Modulations Analyses in Coherent Homodyne Optical CDMA Network Using a Novel Prime Code Family
M. M. Karbassian,H. Ghafouri-Shiraz
Lecture Notes in Engineering and Computer Science , 2007,
Abstract:
Novel PolSK-OCDMA Transceiver Architecture
M. M. Karbassian,H. Ghafouri-Shiraz
Lecture Notes in Engineering and Computer Science , 2008,
Abstract:
Performance Analysis of Unipolar Code in Different Phase Modulations of Coherent Optical CDMA
M. Massoud Karbassian,H. Ghafouri-Shira
Engineering Letters , 2008,
Abstract:
COPD patient satisfaction with ipratropium bromide/albuterol delivered via Respimat: a randomized, controlled study
Ferguson GT, Ghafouri M, Dai L, Dunn LJ
International Journal of Chronic Obstructive Pulmonary Disease , 2013, DOI: http://dx.doi.org/10.2147/COPD.S38577
Abstract: tient satisfaction with ipratropium bromide/albuterol delivered via Respimat: a randomized, controlled study Original Research (325) Total Article Views Authors: Ferguson GT, Ghafouri M, Dai L, Dunn LJ Published Date March 2013 Volume 2013:8 Pages 139 - 150 DOI: http://dx.doi.org/10.2147/COPD.S38577 Received: 27 September 2012 Accepted: 30 November 2012 Published: 19 March 2013 Gary T Ferguson,1 Mo Ghafouri,2 Luyan Dai,2 Leonard J Dunn3 1Pulmonary Research Institute of Southeast Michigan, Livonia, MI, USA; 2Boehringer Ingelheim Pharmaceuticals, Inc, Ridgefield, CT, USA; 3Clinical Research of West Florida, Inc, Clearwater, FL, USA Background: Ipratropium bromide/albuterol Respimat inhaler (CVT-R) was developed as an environmentally friendly alternative to ipratropium bromide/albuterol metered-dose inhaler (CVT-MDI), which uses a chlorofluorocarbon propellant. Objective: The objective of this study was to evaluate patient satisfaction, device usage, and long-term safety of CVT-R compared to CVT-MDI, and to the simultaneous administration of ipratropium bromide hydrofluoroalkane (HFA; I) and albuterol HFA (A) metered-dose inhalers as dual monotherapies (I + A). Design: This is a 48-week, open-label, randomized, active-controlled, parallel-group study (n = 470) comparing CVT-R to CVT-MDI and to I + A. Participants: Patients were at least 40 years of age, diagnosed with chronic obstructive pulmonary disease (COPD), and current or exsmokers. Interventions: Patients were randomized to receive: (1) CVT-R, one inhalation four times daily (QID); or (2) CVT-MDI, two inhalations QID; or (3) I + A two inhalations of each inhaler QID. Main measures: Patient Satisfaction and Preference Questionnaire (PASAPQ) performance score (primary endpoint) and adverse events. Key results: PASAPQ performance score was significantly higher (CVT-R versus CVT-MDI, 9.6; and CVT-R versus I + A, 6.2; both P < 0.001) when using CVT-R compared to CVT-MDI or I + A at all visits starting from week 3, while CVT-MDI and I + A treatment groups were similar. Time to first COPD exacerbation was slightly longer in the CVT-R group compared to the other treatment groups, although it did not reach statistical significance (CVT-R versus CVT-MDI, P = 0.57; CVT-R versus I + A, P = 0.22). Rates of withdrawal and patient refusal to continue treatment were lower in CVT-R compared with CVT-MDI and I + A groups (CVT-R versus CVT-MDI, P = 0.09; CVT-R versus I + A, P = 0.005). The percentage of patients reporting adverse events and serious adverse events was similar across all three treatment groups. Conclusion: CVT-R is an effective, environmentally friendly inhaler that provides patients with a high level of user satisfaction and may positively impact clinical outcomes while having no adverse impacts on patients using the device.
A Novel High-Gain and Broad-Beam Antenna Configuration in VHF Band
Mohammad Reza Ghafouri Fard;Reza Pazoki;M. Akhavan-Bahabadi
PIER Letters , 2009, DOI: 10.2528/PIERL09022606
Abstract: A novel wire antenna configuration is proposed to achieve a 90 degree azimuthal beamwidth in the VHF band. The antenna has been manufactured and the measurement results are presented.
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