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Everything you need to know about Computed Tomography (CT) & CT Scanning

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updated Sun October 25, 2009
Specific anatomic region Colon Application Virtual colonoscopy Author Elliot K Fishman, MD Reference Source JHU Protocol Scanner Used Siemens Sensation 64 KV/Effective mAs/ Rotation time (sec) 120 / 276/ 0...
updated Sun October 25, 2009
Specific Anatomic Region Colon Application Virtual colonoscopy Author Elliot K. Fishman, MD Reference Source JHU protocol Scanner Used Siemens Somatom Sensation 16 KV / Effective mAs / Rotation time (sec) SUPINE 120 / 200 / 0.5 PRONE 12...
updated Sun October 25, 2009
Specific Anatomic Region Colon Application Virtual colonoscopy Author Fishman EK Reference Source Personal Communication Scanner Used Siemens Plus4 Volume Zoom KV / mAs / Time per Rotation (sec) 120/165/.5 Detector Collimation (mm) 1 or 2.5 S...
updated Sun October 25, 2009
Specific Anatomic Region Colon Application Focused virtual colonoscopy (i.e. stage rectal cancer) Author Fishman EK Reference Source Personal Communication Scanner Used Siemens Plus4 Volume Zoom KV / mAs / Time per Rotation (sec) 140/210/.5 De...
updated Sun October 25, 2009
Specific Anatomic Region Colon Application Virtual colonoscopy Author Fishman EK et al Reference Source Personal communication Scanner Used Siemens Somatom Plus-4 Injection Rate Either none used or 3cc/sec Contrast Volume and Type Up to 120cc ...
updated Sun October 25, 2009
Specific Anatomic Region Colon Application Virtual colonoscopy Author Hara AK Reference Source AJR 1997; 168:1181-1184 Scanner Used GE HiSpeed Advantage Injection Rate N/A Contrast Volume and Type Rectal air Area Scanned Entire abdomen Scan ...
updated Mon September 28, 2009
The Current Role of CT in Imaging the Stomach Karen M. Horton , MD and Elliot K. Fishman, MD ABSTRACT Recent advancement in CT scanners and computer technology has renewed interest in utilizing CT for the evaluation of gastric pathology. Multidetecto...
updated Tue November 3, 2009
Virtual Imaging Case Studies Elliot K. Fishman, MD I. Airway (trachea & bronchial tree) II. Colon III. Vascular IV. Bladder One of the most impressive sets of post processed images that can result from combining volume data acquisition of CT wit...
CTisus
updated Tue May 27, 2008
Virtual Colonoscopy: Principals and Techniques: Part 4
CTisus
updated Mon May 19, 2008
Virtual Colonoscopy: Principals and Techniques: Part 3
CTisus
updated Mon May 12, 2008
Virtual Colonoscopy: Principals and Techniques: Part 2
CTisus
updated Mon May 5, 2008
Virtual Colonoscopy: Principals and Techniques: Part 1
updated Fri March 26, 2010
Other Contrast 1. Do we ever use rectal contrast and if so when and why? We do use rectal contrast for select applications. The basic principle would be for cases where opacification of the rectum and sigmoid colon is needed for defining the prese...
updated Fri March 26, 2010
Other Contrast 1. Do we ever use rectal contrast and if so when and why? 2. What is virtual colonoscopy and what is the patient prep for the study? Virtual colonoscopy is a new exam that is used for screening the colon for polyps. It is usually ...
updated Fri March 26, 2010
Other Contrast 1. Do we ever use rectal contrast and if so when and why? 2. What is virtual colonoscopy and what is the patient prep for the study? 3. Do we ever place contrast in the bladder similar to a cystogram and if so why? In cases of s...
updated Fri March 26, 2010
Other Contrast 1. Do we ever use rectal contrast and if so when and why? 2. What is virtual colonoscopy and what is the patient prep for the study? 3. Do we ever place contrast in the bladder similar to a cystogram and if so why?  4. What...
updated Tue April 13, 2010
Special Studies 1. What is virtual colonoscopy and what is the patient prep for the study? 2. Do we ever place contrast in the bladder similar to a cystogram and if so why? 3. What contrast do you put in the bladder (type and volume)? 4. Are t...
updated Fri April 16, 2010
Special Studies 1. What is virtual colonoscopy and what is the patient prep for the study? Virtual colonoscopy is a new exam that is used for screening the colon for polyps. It is usually done in asymptomatic patients as part of the American Cance...
updated Fri April 16, 2010
Special Studies 1. What is virtual colonoscopy and what is the patient prep for the study? 2. Do we ever place contrast in the bladder similar to a cystogram and if so why? In cases of suspected bladder perforation, be it due to trauma (MVA and ...
updated Mon April 19, 2010
Special Studies 1. What is virtual colonoscopy and what is the patient prep for the study? 2. Do we ever place contrast in the bladder similar to a cystogram and if so why? 3. What contrast do you put in the bladder (type and volume)? We drip ...
updated Mon April 19, 2010
Special Studies 1. What is virtual colonoscopy and what is the patient prep for the study? 2. Do we ever place contrast in the bladder similar to a cystogram and if so why? 3. What contrast do you put in the bladder (type and volume)? 4. Are t...
updated Mon April 26, 2010
Other Contrast 1. Do we ever use rectal contrast and if so when and why? 2. What is virtual colonoscopy and what is the patient prep for the study? 3. Do we ever place contrast in the bladder similar to a cystogram and if so why? 4. What contr...
updated Fri July 23, 2010
Podcasting: Discussion Podcasting presents a new conduit to quickly provide practicing radiologists with state-of-the-art information about CT scanners, acquisition protocols, and postprocessing of data sets, available 24 hours a day. The ease of cre...
updated Wed August 18, 2010
Current Clinical Concerns in CT: ResultsData acquisition protocols (arranged anatomically) CT angiography (general) CNS CT angiography Coronary CT angiography Coronary calcifications Cardiac CT Upper extremity CT angiography Pulmonary embolism ...
updated Thu August 19, 2010
Current Clinical Concerns in CT: Results : Protocols   Virtual colonoscopy/CT of the colon   1. Do you know of any sites routinely administering IV contrast for CT colonography? Any contacts you could provide (or papers on the topic) would ...
updated Mon August 23, 2010
Current Clinical Concerns in CT: Results : 3D RenderingWorkstations 1. Have you seen or worked on the Vitrea 3D workstation? If so, how does it compare to Inspace? Answer: I will say that InSpace rates our number one choice and that is based on imag...
updated Mon August 23, 2010
Current Clinical Concerns in CT: Results : 3D Rendering   Software   1. We have "Fly Through" software, not the "Colonography" package. This seems to be a bit difficult to use from a technologist point of view. Will the results be the same?...
updated Mon August 23, 2010
Current Clinical Concerns in CT: Results : Physician Training   Assessment of physician competency   1. My group would like to start doing virtual colonoscopy, but the hospital where we practice is asking us if we have met the required guid...
updated Mon September 1, 2003
In reviewing the potential of virtual colonoscopy for colon cancer screening in my Caldwell Lecture to the American Roentgen Ray Society 2 years ago [2], I touched on certain issues distinct from the traditional technical imaging concerns of radiolog...
updated Mon September 1, 2003
The authors compared a conventional two-directional three-dimensional (3D) display for computed tomography (CT) colonography with an alternative method they developed on the basis of time efficiency and surface visibility. With the conventional techn...
updated Wed February 1, 2006
The objective of this study was to evaluate normal ileocecal valve (ICV) attenuation and composition on CT colonography (CTC). Two hundred twelve patients who underwent CTC at the authors institution were retrospectively identified. Two independe...
updated Mon March 1, 2004
OBJECTIVE: The objective of our study was to prospectively determine the frequency and clinical importance of extracolonic findings on CT colonography in symptomatic patients.SUBJECTS AND METHODS: One hundred eleven symptomatic patients referred for ...
updated Thu December 1, 2005
PURPOSE: To assess the methodologic quality of available data in published reports of computed tomographic (CT) colonography by performing systematic review and meta-analysis.MATERIALS AND METHODS: The MEDLINE database was searched for colonography r...
updated Mon May 1, 2006
In this issue of Radiology, investigators from two countries in two separate studies report the colonic perforation rate at computed tomographic (CT) colonography on the basis of their experience (1,2). Although,the investigators in both studies ...
updated Sun August 1, 2004
CT colonography, also referred to as virtual colonoscopy, has recently been shown to be an accurate screening tool when the 3D display is used for the initial detection of polyps [1]. Although both 2D and 3D CT image displays are useful for virtual c...
updated Sun August 1, 2004
Purpose: To determine the sensitivity of radiologist observers for detecting colonic polyps by using three different data review (display) modes for computed tomography (CT) colonography, or "virtual colonoscopy." Materials and Methods: CT ...
updated Sun August 1, 2004
Rapid volumetric helical CT has extended body CT imaging far beyond standard axial examinations. Technical improvements in high-resolution CT acquisition, coupled with advanced three-dimensional (3D) computer graphics, have permitted interactive 3D v...
updated Tue March 8, 2011
“Forty nine studies provided data on 11,151 patients with a cumulative colorectal cancer prevalence of 3.6% (414 cancers). The sensitivity of CT colonography for colorectal cancer was 96.1% (398 of 414;95% confidence interval:93.8%,97.7%). No h...
updated Mon December 1, 2003
AJR 2003; 181:1599-1606. Pickhardt PJ. OBJECTIVE: The purposes of this study were to directly compare 3D endoluminal volume rendering and navigational capabilities of three different CT colonography systems and to assess feasibility of 3D evaluat...
updated Thu November 1, 2001
AJR 2001; 177:975-988. Ferrucci JT. Virtual colonoscopy (CT colonography) promises to become a primary method for colorectal cancer screening and return radiologists to a major role in colon cancer prevention. Results from major centers in the Un...
updated Mon November 1, 2004
AJR 2004; 183:1343-1347. Pickhardt PJ, Nugent PA, Choi JR, Schindler WR. OBJECTIVE: The clinical significance of flat lesions in colorectal cancer screening remains uncertain. The purpose of this study was to investigate the frequency, histology,...
updated Wed December 1, 2004
RadioGraphics 2004; 24:1535-1559. Pickhardt PJ. Computed tomographic (CT) colonography, also referred to as virtual colonoscopy, holds significant promise for effective large-scale colorectal cancer screening. Two-dimensional (2D) and three-dimen...
updated Sat January 1, 2005
AJR 2005; 184:98-103. Chung DJ, Huh KC, Choi WJ, Kim JK. OBJECTIVE: This study evaluated CT colonography as a method to stage colorectal cancer and detect polyps and cancers in patients with the disease. SUBJECTS AND METHODS: Fifty-one consecut...
updated Tue March 1, 2005
AJR 2005; 184:786-792. Barish MA, Soto JA, Ferrucci JT. OBJECTIVE: The purpose of our study was to determine the current opinions regarding the performance, interpretation, reporting, and clinical role of virtual colonoscopy among a group of sele...
updated Thu December 1, 2005
Radiology 2005; 237:819-833. Macari M, Bini EJ. Over the past decade, computed tomographic (CT) colonography (also known as virtual colonoscopy) has been used to investigate the colon for colorectal neoplasia. Numerous clinical and technical adva...
updated Wed September 14, 2011
Colon SyllabusVascular The Role of 3D Imaging and CT Angiography in the Evaluation of Gastric Pathology Volume-Rendering 3D CT of the Mesenteric Vasculature: Normal Anatomy and Pathology Neoplastic Disease Metastatic Cancer: Classic CT Patterns of...
updated Wed September 14, 2011
Colon: Vascular: The Role of 3D Imaging and CT Angiography in the Evaluation of Gastric Pathology Karen M. Horton , MD and Elliot K. Fishman, MD INTRODUCTION Recent advancements in CT technology including the introduction of multidetector row CT (M...
updated Wed September 14, 2011
Colon: Neoplastic Disease: Radiologic Evaluation of Colon Cancer Karen M. Horton MD, Anwar Padhani MD, Elliot K. Fishman, MD Introduction Colorectal cancer is a common malignancy, resulting in significant morbidity and mortality. It is the second mo...
updated Wed September 14, 2011
Colon: Neoplastic Disease: CT of the Large Bowel Including Virtual Colonoscopy Karen M. Horton, MD Introduction Computed tomography (CT) plays an important role in the evaluation of patients with abdominal pain. Recently, the utility of CT in patien...
updated Wed September 14, 2011
Colon: Neoplastic Disease: CT Colonography: New Concepts in Image Display and Analysis   Karen M. Horton MD, and Elliot K. Fishman MD   Introduction CT colonography (CTC) is considered by many to be a potential breakthrough in the screeni...
updated Wed September 14, 2011
Colon: Neoplastic Disease: Virtual Imaging of the Colon: Current Status   Karen M. Horton, MD     Introduction CT colonography (CTC) is considered by many to be a potential breakthrough in the screening for colorectal polyps and canc...
updated Wed September 14, 2011
Colon: Non Neoplastic Disease: Spectrum of DiseaseIntroduction Computed tomography (CT) plays an important role in the evaluation of patients with abdominal pain. Recently, the utility of CT in patients with suspected colonic pathology has been d...
updated Wed September 14, 2011
Colon: Non Neoplastic Disease: CT Evaluation of the Colon: Inflammatory Disease   Karen M. Horton MD , Frank M. Corl MS and Elliot K. Fishman, MD     Introduction The utility of Computed Tomography (CT) in patients with suspected colon...
updated Wed September 14, 2011
Colon: Non Neoplastic Disease: Crohn's Disease: CT Scanning in Clinical Decision Making   Karen M. Horton ,MD and Elliot K. Fishman, MD     Introduction Despite the availability and widespread use of endoscopy today, radiologic imagi...
updated Wed September 14, 2011
Gastric Pathology: The Current Role of CT in Imaging the Stomach Karen M. Horton , MD and Elliot K. Fishman, MD ABSTRACT Recent advancement in CT scanners and computer technology has renewed interest in utilizing CT for the evaluation of gastric path...
updated Fri September 16, 2011
Small Bowel: The Current Status of Multidetector-Row CT and 3D Imaging of the Small Bowel Karen M. Horton, MD and Elliot K. Fishman, MD Introduction Since its introduction into clinical use in the late 1970’s, computed Tomography (CT) has made ...
updated Wed February 1, 2012
What is the role of CAD in CT today? - Virtual colonoscopy - Coronary artery stenosis detection - Lung nodule detection - Pulmonary embolism detection“ At the expense of increased reading time, CAD has the potential to increase reader sensitivi...
updated Mon February 27, 2017
“Even more exciting is the finding that in some cases, computers seem to be able to “see” patterns that are beyond human perception.This discovery has led to substantial and increased interest in the field of machine learning—...
updated Wed May 31, 2017
Challenges for Virtual Colonoscopy • Extra-colonic findings • Potential of missing small expecially flat lesions • Physican training for interpretation of the studies • Physician acceptance of the procedure • Cost of equipmen...
updated Tue August 29, 2017
“However, instead of ray casting methods, in which each pixel is formed by one light ray, the algorithm used in cinematic rendering is based on path-tracing methods and the global illumination model which simulate the different paths of billion...
updated Tue September 24, 2019
App Development for our Patients - How to prepare for a Radiology exam (i.e. virtual colonoscopy or angiography) - What to do after a Radiology exam is finished? (i.e. can I go back to work) - Disease specific information - Treatment specific informa...
updated Tue September 24, 2019
App Development for our Patients - How to prepare for a Radiology exam (i.e. virtual colonoscopy or angiography) - What to do after a Radiology exam is finished? (i.e. can I go back to work) - Disease specific information - Treatment specific informa...
updated Thu February 21, 2013
This is an educational website to provide informational resources for physicians and technologists interested in virtual colonoscopy. This site includes lectures, teaching cases, journal club, protocols and software tips. We have also included a s...
updated Thu February 21, 2013
This is an educational website to provide informational resources for physicians and technologists interested in virtual colonoscopy. This site includes lectures, teaching cases, journal club, protocols and software tips. ...
updated Thu February 21, 2013
This section of CTisus was designed to provide informational resources for physicians and technologists interested in virtual colonoscopy. This includes lectures, teaching cases, journal club, protocols and software tips. ...
updated Thu February 21, 2013
Lectures Below are a series of short lecture topics which you may find useful. Epidemiology of colon cancer and screening recommendations Results of published clinical trials Review of colon cleansing preparations Stool tagging agents Guide to c...
updated Fri February 22, 2013
Protocols The following is a list of Hopkins scanner and bowel cleansing protocols for Virtual Colonoscopy.  Scanner ProtocolsSiemens Bowel Cleansing ProtocolsPolyethylene glycol (GoLytely)Polyethylene glycol (Miralax)Magnesium citrate   ...
updated Fri February 22, 2013
Bowel Cleansing Protocol: Polyethylene glycol (GoLytely) Start this Prep The Day Before Your CT Virtual Colonoscopy    Prep  Start Date:  ______________________ CHECK OFF EACH BLANK LINE AS STEP IS COMPLETED.   ____1. I...
updated Mon December 1, 2014
Academic Radiology, 11/06/2014 Clinical Article Schaeffer B, et al. The aim of this study is to evaluate the benefits of dual–energy computed tomography (CT) colonography (DECTC) as a preoperative staging tool in patients with clinically suspec...
updated Wed January 7, 2015
Acad Radiol. 2014 Dec;21(12):1567-72. doi: 10.1016/j.acra.2014.07.019. Epub 2014 Nov 1. Schaeffer B, Johnson TR, Mang T, Kreis ME, Reiser MF, Graser A. Abstract RATIONALE AND OBJECTIVES...
updated Wed June 24, 2015
GI TractComputed Tomography After Pancreaticoduodenectomy: Spectrum of Normal Findings and Complications Siva P. Raman, MD CT Evaluation of Pancreatitis: Current Concepts Siva P. Raman, MD    CT Evaluation of GI Bleeding: How We Do It and W...
updated Mon January 4, 2016
AJR Am J Roentgenol. 2016 Jan;206(1):113-8. doi: 10.2214/AJR.15.14840. Rosenkrantz AB1, Prabhu V1. Abstract OBJECTIVE: The objective of this study was to identify geographic and temporal patterns related to the frequencies of online searches within...
updated Mon February 6, 2017
The Role of Social Media in Your Radiology Practice: What You Need to Know and Why You Need to Know ItCan we use social media to expand our clinical practices and our academic potential? Screening studiesVirtual colonoscopyLow dose lung cancer scree...
updated Mon February 12, 2018
3D Imaging in Radiology: What A Long Strange Trip It's Been 3D Imaging has played a major role across imaging and its clinical applications continues to grow. Some of the applications include; Orthopedic imaging (i.e. skeletal trauma)Oncologic imagi...
updated Fri June 1, 2018
Radiographics. 2018 May-Jun;38(3):740-765. doi: 10.1148/rg.2018170044. Epub 2018 Apr 20. García-Figueiras R1, Baleato-González S1, Padhani AR1, Luna-Alcalá A1, Marhuenda A1, Vilanova JC1, Osorio-Vázquez I1, Martíne...
updated Mon October 1, 2018
Radiographics. 2018 Sep-Oct;38(5):1370-1384. doi: 10.1148/rg.2018170159. Epub 2018 Jul 30. Lubner MG1, Menias CO1, Johnson RJ1, Gaballah AH1, Shaaban A1, Elsayes KM1. Abstract  Villous lesions are advanced adenomas that manifest most commonly i...
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