Use of multidetectorrow computed tomography to assess perfusion and viability perfusion imaging by mdct is being actively pursued with cardiac ct. Ductal adenocarcinoma of the pancreas is one of the most aggressive forms of cancer, with only a minority of cases being resectable at the moment of their diagnosis. The hardcover of the multidetectorrow computed tomography. Computed tomography myocardial perfusion imaging with 320. Multidetectorrow computed tomography mdct has become the crosssectional modality of choice in the diagnosis, staging, treatment planning, and followup of patients with pancreatic tumors.
Recent advances in multidetectorrow computed tomography mdct have led to substantial improvements in coverage area, acquisition speed, and temporalspatial resolution, which have strengthened the performance of thoracic and cardiac mdct angiography but have also imposed new challenges for optimization of contrast medium enhancement and scan acquisition strategies. Multidetector computed tomography is also known by a confusing array of other terms such as multidetector ct, multidetectorrow computed tomography, multidetectorrow ct, multisection ct, multislice computed tomography, and multislice ct. Multidetectorrow computed tomography mdct has advanced the approach to diagnostic assessment of many pathologies and now plays an integral role in imaging of both abdominal and cardiovascular diseases. Jun 25, 2015 multidetector row computed tomography mdct represents the technique of choice for the majority of pathologies today and is responsible for the majority of diagnoses. The efficacy of contrast protocol in hepatic dynamic. Multidetector computer tomography in the pancreatic. Due to the faster scanning speed, a redesign of scanning protocols is required. Splitbolus multidetectorrow computed tomography technique. We performed this study in order to investigate the shape of the origin of the celiac artery in maximum intensity projection mip using routine 64 multidetectorrow computed tomography mdct data in order to plan for the implantation of an intraarterial hepatic port system. Scanning and contrast protocols multidetectorrow computed tomography mdct has advanced. Current status of low dose multidetector ct in the urinary tract. The simplicity of acquisition and the wide availability of equipment make this modality especially suitable for routine clinical application.
This document provides recommendations for reliable ct image acquisition for tavitavr planning. An increased number of detector rows allows image acquisition to occur during shorter breathhold intervals and through a decreased number of heartbeats, potentially decreasing the frequency of motion artifacts. Splitbolus multidetector row computed tomography protocol all patients were scanned with a 64detector row scanner philips healthcare, best, the netherlands. Scanning protocols for pancreatic imaging with multidetector row computed tomography mdct are usually multiphasic with acquisition of arterial and portalvenous phases of contrast material cm enhancement. Mdct is a very fast type of computed tomography ct scan. Data acquisition strategies and scanning protocols vary depending on scanner manufacturer, system, and institutional preferences 9. Transverse noncontrast abdominal computed tomography image of a. Multidetectorrow computed tomography to detect coronary. This study is aimed at comparing gastric cancer t and n staging between virtual monochromatic energy images and fusion images generated by dualsource computed tomography dsct dualenergy mode data acquisition prospectively while measuring the iodine concentration of gastric cancer and lymph nodes at different t and n stages from iodine map retrospectively.
The quality of the imaging of the main coronary arteries and side branches provided by multidetector row computed tomography mdct may have importance when assessing congenital coronary artery anomalies. Recent advances in multidetector row computed tomography mdct have led to substantial improvements in coverage area, acquisition speed, and temporalspatial resolution, which have strengthened the performance of thoracic and cardiac mdct angiography but have also imposed new challenges for optimization of contrast medium enhancement and scan acquisition strategies. Dec 14, 2014 computed tomography and magnetic resonance imaging are able to demonstrate and to diagnose hepatic focal nodular hyperplasia when a typical pattern of a wellcircumscribed lesion with a central scar is present. Sep 07, 2018 medical definition of multidetector row computed tomography medical author. The radiation dose, a measure of ionizing energy absorbed per unit of mass, is expressed in grays.
An enteric agent is commonly used in abdominal and pelvis ct scans, but the. Quantitative computed tomography qct of the lung has been used to assess, as demonstrated in figure 1, the presence and extent of emphysema, air trapping, and airway structural characteristics in patients with chronic obstructive pulmonary disease copd and other lung diseases, including asthma 15, and there is an emerging interest in vascular quantification 68. The introduction of multidetector row ct mdct allows us to depict the renal. Objective measures such as image noise or contrasttonoise ratio may not completely. To prevent motion artifacts and optimally utilize the contrast agent bolus, body spiral. Medical definition of multidetectorrow computed tomography medical author. Multidetectorrow computed tomography scanning and contrast. However, we recently obtained a sensitivity of 76%, a specificity of 94%, and a diagnostic accuracy of 91% for detection of. However, approximately 11% of ductal adenocarcinomas still remain undetected at mdct because of the lack of attenuation gradient between the lesion and. Errors in multidetector row computed tomography springerlink. Correlating the stenotic plaque in the coronary artery with the perfusion defect simultaneously by using the same imaging modality further strengthens the diagnosis of ischemia in a patient with cmp. The incorporation of multiple detector rows enables faster scanning and thinner collimation.
A ct scan, or computed tomography scan is a medical imaging procedure that uses computerprocessed combinations of many xray measurements taken from different angles to produce crosssectional tomographic images virtual slices of specific areas of a scanned object, allowing the user to see inside the object without cutting. Multidetector row computed tomography for abdominal. The placement of computed tomography of the pulmonary arteries ctpa in the diagnostic algorithm for pregnant patients is currently firmly established. Our portfolio shows unique arguments with regards to artificial intelligence, low dose, workflow optimization and image quality. Multidetector row ct systems and imagereconstruction. Additionally, the 4dimensional aspect of cardiac mdct allows a comprehensive evaluation of cardiac. The volume represents an uptodate source of technical and practicallyoriented clinical information which should prove of great benefit to all who wish to.
Computed tomography and magnetic resonance imaging are able to demonstrate and to diagnose hepatic focal nodular hyperplasia when a typical pattern of a wellcircumscribed lesion with a central scar is present. Multidetector row ct systems and image reconstruction. Multidetector computed tomography for acute pulmonary. Multidetectorrow computed tomography mdct has allowed imaging of the liver in detail, because of the improved spatial and temporal resolution. Image gently pediatric imaging image wisely adult imaging the purpose of these ct protocol pages is to provide a reference. For initial evaluation of patients with multiple injuries, multidetector row computed tomography mdct is considered a reliable accurate imaging modality. Multidetector row computed tomography mdct has become the crosssectional modality of choice in the diagnosis, staging, treatment planning, and followup of patients with pancreatic tumors. Multidetectorrow computed tomography mdct has become the crosssectional modality of choice in the. The purpose of this current prospective study was to evaluate whether exclusion of cad by multidetector ct mdct might potentially avoid systematic cardiac catheterization in these patients. Multidetectorrow computed tomography mdct features of. Current contrast media delivery strategies for cardiac and p. The accurate detection and characterization of pancreatic carcinoma is very important for patient management. The purpose of this study was to describe the myocardial enhancement patterns in patients with myocardial infarction using twophase contrastenhanced multidetectorrow computed tomography mdct.
Ct colonography is an emerging method to screen for colonic polyps 1 and ct remains one of the main diagnostic methods for imaging the hepatobiliary system and the pancreas. Multidetector computed tomography mdct is a form of computed tomography ct technology for diagnostic imaging. Calcified vessels still represent a strong limitation to most mdcta systems. Multidetectorrow helical computed tomography mdct has the potential to improve the diagnostic assessment of the abdomen.
Examples of mdct imaging of congenital coronary artery. Ct is a noninvasive test that uses xrays to make pictures of your heart. Multiphasic contrastenhanced multidetectorrow ct of liver. Spiromics protocol for multicenter quantitative computed.
Intravenous contrast medium administration and scan timing at. The possibility to acquire diagnostic images with shorter scan duration, longer scan ranges, andor thinner sections, mdct has facilitated the opening of new horizons, such as interventional. Dec 21, 2012 we performed this study in order to investigate the shape of the origin of the celiac artery in maximum intensity projection mip using routine 64 multidetector row computed tomography mdct data in order to plan for the implantation of an intraarterial hepatic port system. Multidetector row computed tomography mdct represents the technique of choice for the majority of pathologies today and is responsible for the majority of diagnoses.
Splitbolus versus triphasic multidetectorrow computed. Coronary computed tomography angiography cta provides high sensitivity and negative predictive value for the detection of obstructive coronary artery disease cad. Therefore, contrast administration strategies and scanning protocols need to be optimised either by increasing the rate of contrast injection or through the use of contrast media cm with a higher iodine concentration to adapt to a shorter scan duration. Scanning and contrast protocols multidetectorrow computed tomography mdct has advanced the approach to diagnostic assessment of many. Conventional and helical computed tomography have been used for. Pdf multidetector row computed tomography download full. The 1979 nobel prize in physiology or medicine was awarded.
Multidetectorrow computed tomography for evaluating the. Dec 21, 2018 multidetector computed tomography is also known by a confusing array of other terms such as multidetector ct, multidetector row computed tomography, multidetector row ct, multisection ct, multislice computed tomography, and multislice ct. Patientspecific contrast injection protocols for cardiovascular multidetector row computed tomography. Noncoronary applications of cardiac multidetector row computed tomography laurens f. Catheter insertion for intravenous iv contrast infusion in multidetectorrow computed tomography mdct. Our protocol consisted of unenhanced lowmilliampere scans of the upper abdomen and a single scan of the cap, after an iv injection of the of a maximum of 150 ml of contrast.
For initial evaluation of patients with multiple injuries, multidetectorrow computed tomography mdct is considered a reliable accurate imaging modality. Technical basics and preliminary clinical applications in small animals the veterinary journal, vol. Atherosclerotic plaque characterization by multidetector. Sixtyfour mdct achieves higher contrast in pancreas with. Current contrast media delivery strategies for cardiac and. As a result of the advent and advances of multidetector row computed tomography mdct, coronary computed tomography ct has become popular and is performed at many institutions.
Normal anatomy of abdominal vessels, their variants, and the congenital anomalies were assessed. Recent advances in cardiac multidetectorrow computed tomography mdct technology. Our aim is to propose the splitbolus multidetector row computed tomography technique as an alternative to the conventional triphasic technique in the detection and characterization of. Multidetectorrow computed tomography mdct gathers multiple images simultaneously and continuously, thus acquiring a greater amount of diagnostic information per unit time. Aug 01, 2005 multidetectorrow computed tomography mdct gathers multiple images simultaneously and continuously, thus acquiring a greater amount of diagnostic information per unit time. Several innovations have improved the utility of ct, such as the use of helical spiral systems, in which slipring technology enables conduction of. Johnson pt, christensen g, lai h, eng j, fishman ek. Catheter insertion for intravenous iv contrast infusion in multidetector row computed tomography mdct. However, despite the low number of studies dedicated to errors in mdct, ct reporting seems especially prone to generating errors and errors are an inevitable part of mdct practice. With advances in multidetectorrow computed tomography mdct, it is now possible to image the lung in 10 s or less and accurately extract the lungs, lobes, and airway tree to the fifth through seventhgeneration bronchi and to regionally characterize lung density, texture, ventilation, and perfusion. Ct scan computed tomography cat scan centers and services. Multidetectorrow computed tomography mdct has advanced the approach to. Early and delayed myocardial enhancement in myocardial.
Ct colonography is an emerging method to screen for colonic polyps 1 and ct remains one of the main diagnostic methods for. Multidetector row computed tomography mdct has advanced the approach to diagnostic assessment of many pathologies and now plays an integral role in imaging of both abdominal and cardiovascular diseases. Multidetector row helical computed tomography mdct has the potential to improve the diagnostic assessment of the abdomen. In addition, we aimed to study the feasibility of using hccm with a reduced total iodine dose.
Managing patient dose in multidetector computed tomography. The efficacy of contrast protocol in hepatic dynamic computed. Due to multiphase scanning, with some ct urography protocols patients. Multidetector computed tomographies were recorded on cds and were centrally evaluated by a panel m. Cardiac computed tomography multidetector ct, or mdct. Intravenous contrast medium administration and scan timing at ct. The key component of all approaches is an ecgsynchronized computed tomographic angiography cta data set that. The possibility to acquire diagnostic images with shorter scan duration, longer scan ranges. T and n staging of gastric cancer using dualsource. The rapid technologic development of multidetector row computed tomography mdct over the past. Multidetector row computed tomography mdct has rapidly evolved from the research setting to become a useful clinical tool and must now also be considered for this role.
The introduction in 1998 of multidetector row computed tomography ct by the major ct vendors was a milestone with regard to increased scan speed, improved zaxis spatial. Multidetector row computed tomography mdct is a powerful noninvasive imaging tool with a number of advantages over previous computed tomography ct technology. Motion still causes most image artifacts currently found during coronary 16detector row mdcta. Radiation exposure in computed tomography pdf the advent of computed tomography ct has revolutionized di agnostic. Intravenous contrast medium administration and scan timing. Submillimetre, ecg gated mdct allows rapid acquisition of a whole heart, three dimensional volume of data in one scan.
But the optimal techniques for intravenous iv injection of contrast media cm and scanning of the liver to diagnose hepatocellular carcinoma hcc have been a subject of controversy for several years. Our aim is to propose the splitbolus multidetectorrow computed tomography technique as an alternative to the conventional triphasic technique in the detection and. The aim of the present doctoral thesis was to evaluate the use of multidetector row computed tomography as new non invasive method in the assessment of in vivo abdominal vascular anatomy in dogs. Computed tomography introducing groundbreaking ct products and technologies for decades, we are known as the innovation leader in this field.
Multidetector row computed tomography mdct is increasingly taking a central role in identifying subphenotypes within chronic obstructive pulmonary disease copd, asthma, and other lungrelated disease populations, allowing for the quantification of the amount and distribution of altered parenchyma along with the characterization of airway and vascular anatomy. Coronary ct is useful for diagnosing cases of moderate risk of coronary artery disease. Noninvasive assessment of coronary plaque using multidetector. Bax multidetector row computed tomography mdct has a high diagnostic accuracy to evaluate coronary artery stenoses. The ct examinations were performed using all variable. Protocols should be optimized to give the lowest dose required to achieve appropriate image quality for a. Additionally, the 4dimensional aspect of cardiac mdct allows a comprehensive evaluation of cardiac structure and.
Multidetectorrow computed tomography mdct has advanced the approach to diagnostic assessment of many pathologies and now plays an integral role in imaging of both abdominal and. In this study we aimed to assess the image quality and degree of vascular enhancement using lowconcentration contrast media lccm 300 mg i ml 1 and highconcentration contrast media hccm 370 mg i ml 1 on 64slice multidetector row ct mdct abdominal ct angiography cta. Current status of low dose multidetector ct in the urinary tract ncbi. Use of multidetector row computed tomography to assess perfusion and viability perfusion imaging by mdct is being actively pursued with cardiac ct. Preoperative identification of significant coronary artery disease cad in patients prior to valve surgery requires systematic invasive coronary angiography. Because ct examinations had been performed with various types of equipment over a long period, the scanner techniques and protocols varied. The advent of computed tomography ct has revolutionized. Scct guidelines for performance of coronary computed. Med multidetectorrow computed tomography mdct has advanced the approach to diagnostic assessment of many pathologies and now plays an integral role in imaging of both abdominal and cardiovascular.
They can take images of the beating heart, and show calcium and blockages in your heart arteries. Early and delayed myocardial enhancement in myocardial infarction using twophase contrastenhanced multidetectorrow ct objective. Multidetector row ct has dramatically improved the results of computed tomography in all clinical applications, but its beneficial impact has been most striking in vascular imaging. In many institutions, multidetector ct urography is performed instead of.
Noncoronary applications of cardiac multidetector row. Contrastenhancement theory and practical scan protocol with a combination of fixed injection duration and patients bodyweighttailored dose of contrast material. Radiologists constantly attempt to devise new ways to reduce the amount of time needed to adequately image trauma victims while simultaneously improving image quality 1. The increasing impact of multidetector row computed. Two patients underwent ct scanning at a referring hospital. Jan 01, 2008 noncoronary applications of cardiac multidetector row computed tomography laurens f. Modern ct scanners multidetector ct, or mdct work very fast and detailed. Splitbolus multidetectorrow computed tomography protocol all patients were scanned with a 64detector row scanner philips healthcare, best, the netherlands. Therefore, contrast administration strategies and scanning protocols need to be optimised either by increasing the rate of contrast injection or through the use of. Standard contrastenhanced protocols for the diagnosis of pe were used image acquisition beginning with a scanning delay of. Jul 31, 20 multidetector row computed tomography mdct has allowed imaging of the liver in detail, because of the improved spatial and temporal resolution. Scct guidelines for performance of coronary computed tomographic angiography. Nov 15, 2016 multidetector row computed tomography mdct has become the crosssectional modality of choice in the diagnosis, staging, treatment planning, and followup of patients with pancreatic tumors. A report of the society of cardiovascular computed tomography guidelines committee suhny abbara, md, armin arbabzadeh, md, tracy q.
Focussing on scanning and contrast protocols, the current advantages and. Practice parameter for the use of intravascular contrast media 93 and the acr. Atherosclerotic plaque characterization by multidetector row. The first generation of computed tomography ct scanners developed in the 1970s, utilized a single thin xray beam generator and a single xray detector element housed in a circular gantry that rotated around the patient. A total of 1,104 patients with hepatocellular carcinoma were assessed with mdct. With advances in multidetector row computed tomography mdct, it is now possible to image the lung in 10 s or less and accurately extract the lungs, lobes, and airway tree to the fifth through seventhgeneration bronchi and to regionally characterize lung density, texture, ventilation, and perfusion.
1528 1235 278 1516 843 1259 812 446 638 1558 1376 52 1400 670 1369 174 588 975 517 1472 634 387 1243 1548 1197 205 1494 77 66 113 431 61 855 508 630 381 1280 491 276 932 427 269