Radiology Commons^™

Infectious Intracranial Aneurysms: Collaboration For Treatment Success, Erin M. Conahan Rn, Bsn, Cnrn

Patient Care Services / Nursing

No abstract provided.

Establishing The Quality Management Baseline In The Use Of Computed Tomography Machines In Kenya, Geoffrey K. Korir, Jeska S. Wambani, Ian K. Korir, Bernard O. Ochieng

Imaging & Diagnostic Radiology, East Africa

The objective of this study was to assess the level of compliance to quality assurance and image quality standards in computed tomography facilities in Kenyan hospitals. A quality assurance inspection and physical image quality assessment in eighteen representative computed tomography facilities were completed. A quantitative method was developed and used to score the results obtained from the physical image quality measurements using the American Association of Physicists in Medicine (AAPM) water phantom. Inspection was done in order to establish the level of compliance with internationally recognized standards such as those stipulated in the European Guidelines Quality Criteria for Computed Tomography …

Determining Efficacy Of Breast Cancer Therapy By Pet Imaging Of Her2 Mrna, Bishnuhari Paudyal, Kaijun Zhang, Changpo Chen, Neil Mehta, Eric Wickstrom, Brian Gray, Jeffrey Mattis, Koon Pak, Mathew L Thakur

Department of Radiology Faculty Papers

No abstract provided.

Shades Of Grey: An Exploration Of The Student Learning Experience In Diagnostic Radiology Education, Kathleen Linda Linaker

Dissertations

Diagnostic radiology education is a specialty within healthcare education and encompasses education at both the undergraduate and resident level. There is little research regarding what constitutes effective radiology education. The broad purpose of this study was to investigate through the student perspective how chiropractic students learned diagnostic radiology within their curriculum and what contributed to this learning. This interview-based, qualitative research explored the learning experiences of 12 fourth-year chiropractic students at two colleges. Specifically this study investigated a) the learning strategies students believe both worked and didn't work in learning radiology, b) student perceptions of the effectiveness of instructional methods …

Outcome Of Febrile Neutropenic Patients On Granulocyte Colony Stimulating Factor In A Tertiary Care Hospital, Asif Husain Osmani, Tayyaba Zehra Ansari, Nehal Masood, Bilal Ahmed

Department of Radiation Oncology

Introduction: Febrile neutropenia is a relatively frequent event in cancer patients treated with chemotherapy and improvement in absolute neutrophil count (ANC) has been linked directly to improved outcome. Evaluation of granulocyte colony stimulating factors (GCSFs) for treatment has shown reduced incidences of episodes of prolonged neutropenia and protracted hospitalization. To determine absolute neutrophil counts with GCSF in febrile neutropenic cancer patients admitted to a tertiary care centre and to co-relate the improvement in ANC with mortality and hospital discharge.Methods: A prospective cross sectional study was carried at an oncology ward at Aga Khan University hospital from January 2010 to June …

Tracking Of In-111-Labeled Human Umbilical Tissue-Derived Cells (Hutc) In A Rat Model Of Cerebral Ischemia Using Spect Imaging, Ali S. Arbab, Christine Thiffault, Bradford Navia, Stephen J. Victor, Klaudyne Hong, Li Zhang, Quan Jiang, Nadimpalli Rs Varma, Asm Iskander, Michael Chopp

Wayne State University Associated BioMed Central Scholarship

Abstract

Background

In order to increase understanding of how infused cells work, it becomes important to track their initial movement, localization, and engraftment efficiency following transplantation. However, the available in vivo cell tracking techniques are suboptimal. The study objective was to determine the biodistribution of intravenously administered Indium-111 (In-111) oxine labeled human umbilical tissue-derived cells (hUTC) in a rat model of transient middle cerebral occlusion (tMCAo) using single photon emission computed tomography (SPECT).

Methods

Rats received 3 million In-111 labeled hUTC (i.v.) 48 hrs after tMCAo. Following the administration of either hUTC or equivalent dose of In-111-oxine (18.5 MBq), animals …

Using Learned Under-Sampling Pattern For Increasing Speed Of Cardiac Cine Mri Based On Compressive Sensing Principles, Pooria Zamani, Mohammad Kayvanrad, Hamid Soltanian-Zadeh

Wayne State University Associated BioMed Central Scholarship

Abstract

This article presents a compressive sensing approach for reducing data acquisition time in cardiac cine magnetic resonance imaging (MRI). In cardiac cine MRI, several images are acquired throughout the cardiac cycle, each of which is reconstructed from the raw data acquired in the Fourier transform domain, traditionally called k-space. In the proposed approach, a majority, e.g., 62.5%, of the k-space lines (trajectories) are acquired at the odd time points and a minority, e.g., 37.5%, of the k-space lines are acquired at the even time points of the cardiac cycle. Optimal data acquisition at the even time points is learned …

Trends In The Utilization Of Outpatient Advanced Imaging After The Deficit Reduction Act., David C Levin, Vijay M Rao, Laurence Parker

Department of Radiology Faculty Papers

PURPOSE: After the Deficit Reduction Act (DRA) took effect in 2007, there was concern that private office-based imaging facilities would close, that advanced imaging would shift to less convenient hospital-based facilities, and that access to advanced imaging might be restricted. The aim of this study was to see if these developments occurred during the years after the DRA.

METHODS: Using Medicare data, outpatient CT, MRI, and nuclear medicine trends before and after the DRA were studied. Procedure volumes performed in private offices and hospital outpatient departments (HOPDs) were tabulated separately. Volumes were tracked from 2000 to 2006 (before the DRA) …

Left Atrial Volume: Comparison Of 2d And 3d Transthoracic Echocardiography With Ecg-Gated Ct Angiography., Anish R Koka, Stuart D Gould, Alyson N Owen, Ethan J. Halpern

Department of Radiology Faculty Papers

RATIONALE AND OBJECTIVES: Left atrial volume (LAV) measurement by conventional two-dimensional (2D) transthoracic echocardiography (TTE) may be limited by the geometric model, by suboptimal definition of left atrial endocardium, or by chamber foreshortening. Three-dimensional (3D) TTE is posited to eliminate chamber foreshortening, and LAV measurement by 3D TTE should be more reflective of true LAV. The aim of this study was to compare conventional 2D TTE and newer 3D TTE for measurements of LAV to multidetector computed tomographic (MDCT) measurements using automated chamber reconstruction (ACR).

MATERIALS AND METHODS: Twenty-two subjects consented to undergo 2D TTE and 3D TTE immediately prior …

Optical Imaging For Determination Of Apoptosis Medicated Therapeutic Efficacy, Kaijun Zhang, Bishnuhari Paudyal, Neil Mehta, Brian Gray, Koon Y. Pak, Eric Wickstrom, Mathew L Thakur

Department of Radiology Faculty Papers

No abstract provided.

Correlates Of Morbidity And Mortality In Severe Necrotizing Pancreatitis, K. M. Pal, Pashtoon Murtaza Kasi, Mohammad Tayyeb, S. M. Faisal Mosharraf, Zafar Fatmi

Community Health Sciences

Acute severe pancreatitis is associated with a high morbidity and mortality and frequently is accompanied by underlying pancreatic parenchymal necrosis. Patients with pancreatic necrosis must be identified, because the morbidity and mortality rate in this subgroup is much higher. Our objective was to compare the clinical outcomes of these patients based on the degree of pancreatic necrosis. A total of 35 patients were noted to have pancreatic necrosis. These were divided into 2 groups based on extent of necrosis: group A had less than 50% necrosis and group B had more than 50% necrosis. The rate of mortality (5% versus …

Functional Evaluation Of The Urinary Tract By Duplex Doppler Ultrasonography In Patients With Acute Renal Colic., Raza Sayani, Muhammad Ali, Kashif Shazlee, Rana Shoaib Hamid, Kamran Hamid

Department of Radiology

Purpose: To determine the role of duplex Doppler ultrasonography (DDU) in Patients with acute unilateral renal obstruction. Subjects And Methods:A total of 161 Patients with suspected renal colic due to urolithiasis were evaluated by DDU followed by intravenous urography (IVU). The mean intra-arterial resistive index (RI) and the difference of mean resistive index between both kidneys (delta RI) were determined for each person. An RI value of ≥0.70 and a delta RI value of ≥0.06 were taken as the discriminatory threshold for obstruction. IVU results were considered the " reference standard" against which renal DDU findings were compared.

Results: …

Can Computer Assisted Diagnosis (Cad) Be Used As A Screening Tool In The Detection Of Pulmonary Nodules When Using 64-Slice Multidetector Computed Tomography?, Zishan Haider, Muhammad Idris, W. Memon, Nazia Kashif, Sidra Idris, Zafar Sajjad, Saeed Akram

Department of Radiology

Objectives:To evaluate (1) whether or not the addition of computer-assisted diagnosis (CAD) to 64-slice multidetector computed tomography (CT) can be used as a screening tool for detection of pulmonary nodules in routine CT chest examinations and (2) whether or not to advocate the incorporation of CAD as a screening tool into our daily practice. Materials And

Methods:

A retrospective cross-sectional analysis of 109 consecutive Patients who had all undergone routine contrast-enhanced CT chest examinations for indications other than lung cancer at the Radiology Department of Aga Khan University Hospital, Karachi, between November 2010 and January 2011. All examinations were …

Sonographic Fetal Biometry Charts For A Pakistani Cohort., W. Akhtar, A. Ali, M. A. Arain, F. Saeed, S. Siddiqui, A Memon

Department of Radiology

This study aimed to develop growth centiles at different gestational weeks for fetal biparietal diameter, abdominal circumference, femur length and head circumference in a Pakistani cohort. Data were collected at a tertiary referral hospital from pregnant women at gestational ages 13-40 weeks referred for obstetric ultrasound as a part of routine antenatal care. A total of 1599 fetal sonographic biometric measurements were collected after screening for the inclusion criteria. For each measurement, separate regression models were derived to estimate the mean, standard deviation and reference percentiles at each week of gestational age for this cohort. The best fitting model for …

Novel Amino Acid Transporter-Targeted Radiotracers For Breast Cancer Imaging, Fanlin Kong

Dissertations and Theses (Open Access)

Breast cancer is the most common malignancy among women in the world. Its 5-year survival rate ranges from 23.4% in patients with stage IV to 98% in stage I disease, highlighting the importance of early detection and diagnosis. ¹⁸F-2-Fluoro-2-deoxy-glucose (¹⁸F-FDG), using positron emission tomography (PET), is the most common functional imaging tool for breast cancer diagnosis currently. Unfortunately, ¹⁸F-FDG-PET has several limitations such as poorly differentiating tumor tissues from inflammatory and normal brain tissues. Therefore, ¹⁸F-labeled amino acid-based radiotracers have been reported as an alternative, which is based on the fact that tumor cells uptake …

Optimizing Heart Dose Reduction For Deep Inspiration Left Breast Radiotherapy, Ronald James Harder

UNLV Theses, Dissertations, Professional Papers, and Capstones

Multiple studies have shown that an increased risk of late injury cardiac abnormalities including congestive heart failure (CHF), ischemia, and coronary artery disease (CAD) can be associated with common left breast radiation therapy (RT) techniques. Many radiation therapy clinics have adopted the Deep Inspiration Breath Hold (DIBH) technique for the treatment of the left breast with external beam therapy based on studies showing a decrease in the dose received by the heart. A common technology used to monitor inhalation during DIBH is the Real-Time Position Management (RPM) system (Varian Medical Systems, Palo Alto, CA). This study analyzes if there is …

Value-Added Services Of Hospital-Based Radiology Groups, Vijay M. Rao, Md

Department of Radiology Faculty Papers

Presentation at 97th Scientific Assembly and Annual Meeting of the Radiological Society of North America (RSNA).

Summary of presentation.

16 slides.

Diagnosis Of Hepatoma Using Grayscale And Doppler Ultrasound In Patients With Chronic Liver Disease., W. Memon, Zishan Haider, Mirza Amanullah Beg, Muhammad Idris, Tanveer Ul Haq, Sidra Idris

Department of Radiology

Objective:To determine the diagnostic accuracy of liver ultrasound for the detection of hepatoma in chronic liver disease (CLD) Patients by either taking histopathology or serum alpha-fetoprotein levels or a biphasic computed tomography (CT) scan (whichever is available) as the gold standard. Study Design: Cross-sectional. Place And Duration Of Study: Radiology Department, The Aga Khan University Hospital, Karachi, Pakistan, from January 2007 to January 2010.

Methods:

A total of 239 Patients (156 males and 83 females) with clinical suspicion or surveillance of hepatoma in CLD referred to the radiology department for ultrasound evaluation followed by either liver biopsy and histopathology …

Endovascular Approach As Primary Treatment For Traumatic Carotid Cavernous Fistula: Local Experience From Pakistan, Rana Shoaib Hamid, Tanveer Ul Haq, Muhammad Shahzad Shamim, Syed Faraz Kazim, Basit Salam

Department of Radiology

Objective: To evaluate the technical success, complications and outcome of endovascular management of post traumatic carotid cavernous fistula (CCF) in patients presenting at a tertiary care hospital in Karahci.
Methods: Descriptive case series of 26 patients of post traumatic CCF treated by endovascular techniques was carried out at Radiology and Neurosurgery departments of Aga Khan University hospital between January 2010 to March 2010. Medical records and radiology reports were retrospectively reviewed from November 2000 to December 2009. The diagnosis was primarily clinical and was confirmed in all cases by CT or MRI. Endovascular procedures were performed under general anaesthesia through …

Labrad : Vol 37, Issue 2 - September 2011, Aga Khan University Hospital, Karachi

LABRAD - Departments of Pathology & Laboratory Medicine and Radiology Archives

• Biochemical Bone Profiles Available at Clinical Laboratory of Aga Khan University Hospital
• Ionized Calcium Determination in Clinical Labortory
• Parathyroid Hormone Disorders and Issues of Testing
• Tubular Maximum Reabsorption Rate of Phosphate to Glomerular Filtration Rate (TmP/GFR)
• LABRAD Quiz
• Renal Osteodystrophy: A Disturbed Metabolic Aspect of Renal Failure
• Osteopenia and Osteoporosis in Beta Thalassemia Major
• Role of β2 Microglobulin in Multiple Myeloma
• Update on Microbiological Diagnosis of Bone and Joint Disorders
• Bone Sarcomas: Role of Histopathology in Diagnosis