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The first group consists of patients with colorectal liver metastases who have had treatment with chemotherapy and are now awaiting surgery. This group would have had Multidetector Liver CT (MDCT) imaging prior to the chemotherapy, and will now undergo post chemotherapy MDCT as part of standard clinical care in addition to Gd-EOB-DTPA enhanced liver MRI and Diffusion Weighted MRI (DW-MRI). The MRI will be performed as an additional imaging investigation after obtaining informed consent.

The second group consists of patients with colorectal liver metastases who are due to receive neoadjuvant chemotherapy. This group will be imaged prior to receiving and after receiving chemotherapy. This will all be done prior to surgical resection of their colorectal liver metastases.

Primovist enhanced MRI, Diffusion weighted MRI

MR imaging

Kartik Jhaveri, MD

1. Primovist-enhanced Magnetic resonance imaging (MRI) and Diffusion Weighted MRI (DW-MRI) is superior to Multidetector Computed axial Tomography (MDCT) in the detection of colorectal liver metastases. Fatty changes in the liver after chemotherapy treatment likely reduces the chances of seeing metastatic lesions on CT especially when the lesions are small (\<10 mm). When compared with CT, Primovist-enhanced MRI and DW-MRI have the potential to provide higher contrast resolution enabling better detection of colorectal liver metastases following chemotherapy.
2. Primovist-enhanced MRI and DW-MRI are superior to CT in assessing and predicting treatment response of patients with colorectal liver metastases to chemotherapy. Primovist-enhanced MRI by providing superior resolution may provide improved accuracy in metastatic lesion margin detection thereby providing higher accuracy in estimating tumor response based on size criteria. DW-MRI provides information indirectly about tumor composition and therefore is likely to be superior to MD-CT in assessing treatment response.

Two groups of patients will be analyzed. The second group consists of patients with colorectal liver metastases who are to go for chemotherapy prior to surgery for metastases resection. This group will be CT and MRI scanned prior to chemotherapy and after chemotherapy. The first group of patients will consist of those patients who have already received chemotherapy and are likely to have surgery to resect liver metastases. This group will have only one set of scans done 4-6 weeks prior to their operation. The pathology of the resected metastases and CT and MRI images will be analyzed and compared.

Comparison of Primovist-enhanced MRI, Diffusion Weighted MRI and Multidetector CT of Colorectal Liver Metastases

Prospective Comparison of 3T Gd-EOB-DTPA-enhanced MRI, Diffusion Weighted MR Imaging and MDCT of Colorectal Liver Metastases for Preoperative Detection and Assessment of Treatment Response Following Chemotherapy Treatment

Bayer

University Health Network, Toronto

Sergio Salerno, Prof.

Daniela Origgi, PhD

The situation in Italy regarding radiation dose to patients undergoing Multidetector row Computed Tomography (MDCT) scans is unclear despite Italian law require that each centre check the Reference Dose Level (RDL) every two years. RDL in CT were first suggested in a document of 1998 published by the European Commission (EUR16262/1998) based on the results of an older survey in the UK from the late 1980s. Those RDLs, expressed in terms of Computed Tomography Dose Index (CTDI) and Dose Length Product (DLP), are reported in the Italian law (D.Lgs.187/00). However, in Italy there is no governmental authority comparable to the UK's National Radiological Protection Board, deputed to dose evaluation and protection.

An overview of the Italian situation is relevant in order to know the actual dose levels for MDCT administered to patients both adults and paediatrics.

CT imaging is rapidly growing and now represents an indispensable medical procedure for many clinical conditions. The widespread availability and expanding use of multidetector CT (MSCT) due to its high performance and very short acquisition times, has resulted in an increase in both frequency of procedures and level of patient exposures from CT scan examinations, but issues related to radiation, including potential risks, have been relatively neglected. Particular attention should be given to CT scans in children, as they represent about 10% of all the X-ray studies performed on them, accounting for about 75% of the total dose administered. CT in children should be performed only when absolutely necessary as their longer life expectation and sensitivity to X-ray radiations may increase the risk of causing radiation-induced neoplasm's in later years.

According to the 2000 report of the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) the frequency of CT examinations in countries with high healthcare levels has increased by a factor of 8; with the mean effective dose increasing from 1,3 mSv in the 1970s to 8,8 mSv per year per 1000 persons in the early 1990s. In Switzerland, Germany and United Kingdom the increases in the number of reported CT examinations ranged between 39% and 70% over just the period 1998-2002. The 2000 ISTAT report's estimated that 1479 CT apparatus were installed in Italy performing a total of 3.327.750 CT examinations \[3\]. Considering an increase of 40% every 5 years, comparable to other European countries, 6.000.000 CT examinations can be estimated for 2010.

The primary objective of the study is to obtain a snapshot of Italian CT practice in adults and children that is up-to-date in regards to information concerning multidetector 16- and 64- row CT. A second goal is to update the national reference dose levels.

The study should further establish a sustainable database for the ongoing collation of further data from local surveys of CT. This will facilitate the analysis of trends and periodic review of national reference doses for CT in a way similar to other European countries.

Radiology departments dealing with adult and paediatric CT in Italy will receive an invitation to participate to the survey and a questionnaire regarding some important features of their CT equipment. Four common protocols will be used for dose calculation: CT scan of the head, lumbar spine, chest and abdomen. Cardiac CT data will be collected only for adults, as in children other examinations, such as MR are commonly preferred to CT just for radioprotection reasons.

All radiology departments using a 16 or 64 multidetector CT will be sought for enrolment in the study. Centres that perform at least 2000 MDCT examinations in either adults or paediatrics in one year and do a regular quality control on their CT scanner will be included in the survey list and divided according to their geographical site, namely the four macro-areas of Northern Italy, Centre, Southern Italy and Islands.

Each enrolled centre will receive a standardized form to fill in. The main technical parameters included in the questionnaire will be: CT scanner manufacturer, model and type, characteristics of automatic modulation system (modulation directions and chosen image quality level e.g. Noise Index and effective mAs). Tube voltage (kV), current (mA), tube rotation time(s), slice thickness, total acquisition time (s), pitch, filtration should also be given. For each patient examination Volumetric Computed Tomography Dose Index (CTDIvol) and Dose Length Product (DLP) should be collected from the dose report. For the cardiac protocol, a dedicated questionnaire will be distributed including typical cardiac parameters in addition to those mentioned above. For the protocols performed on adults, data are requested for normal patients (excluding those who were excessively small or large). For children, the age at examinations and weight are included. Paediatric studies will be those of persons less than 16 years old, as established by the Italian regulation.

In order to verify the accuracy of the console displayed values a medical physicist should measure before starting the survey the CTDIvol following the European Guidelines EUR16262/1998. Errors less then 10% between the measured and reported value will be accepted.

Each protocol will be analysed separately and descriptive statistical analysis of the main parameters will be performed. These include sample size, range, median, mean value, third quartile and percentage coefficient of variation.

The survey will be conducted over a period of twelve months. The data will be treated in an anonymous way, with the centres being coded by alphabetical letters. The investigators calculate that a sample size of 2,421 MDCT examinations for each protocol will be sufficient to guarantee a confidence of 90% and an absolute error of 5% of the average dose, with simple random sampling and assuming a conservative hypothesis that the population standard deviation is five times that estimated in a similar German survey \[4\].

In order to increase the accuracy of the estimation the investigators will adopt a stratified random sampling scheme that consists of stratification into the four geographical Italian macro-areas and the random selection of a number of MDCT examinations proportional to the population living in each macro-area. Stratification facilitates the tasks of data collection and survey, and aides in removing a possible source of bias related to the different frequency of MDCT apparatus, as MDCT services will be clustered into internally homogeneous strata.

Adult and Paediatric Patient Radiation Doses From Multidetector Row Computed Tomography Scans: a National Survey

Adult and Paediatric Patient Radiation Doses From Multidetector CT Scans: a National Survey

Società Italiana di Radiologia Medica

University of Palermo

Associate Professor

Adverse Reaction to CT

CT Scan

Age, Continuous

Age, Categorical

Sex: Female, Male

Italy

Region of Enrollment

Sergio Salerno

Adult

Pediatric patients submitted to head CT scan

Pediatric

Value of Mean Volumetric Computed Tomography Dose Index (CTDI Vol) for Head CT Examinations.

Chest CT- Adult

Chest CT- Pediatric

Value of Mean Volumetric Computed Tomography Dose Index (CTDI Vol) for Chest CT Examinations.

Abdomen CT Adults

Pediatric patients submitted to abdomen CT

Abdomen CT Pediatric

Value of Mean Volumetric Computed Tomography Dose Index (CTDI Vol) for Abdomen CT Examinations.

Adult Cardiac CT

Value of Mean Volumetric Computed Tomography Dose Index (CTDI Vol) for Cardiac CT Examinations.

Adult patients submitted to chest abdomen and pelvis CT examinations.

Adult Patient Chest Abdomen and Pelvis

Value of Mean Volumetric Computed Tomography Dose Index (CTDI Vol) for Chest Abdomen and Pelvis CT Examinations.

CT Adult Spine

Value of Mean Volumetric Computed Tomography Dose Index (CTDI Vol) for Spine CT Examinations.

A total of 65 radiology departments, with 70 MDCT scanners, collected data of 5942 adult patients, randomly chosen, who underwent to CT examinations for common clinical for 5 common different protocols including also new examination that will be in the near future common practise as cardiac CT.

A prevalence of multiphasic study was documented in many chest abdomen and pelvis (CAP) studies and abdominal studies.

Overall Study

Study title	NCT ID	Conditions	Interventions	Eligibility	Organization	Link
Comparison of Primovist-enhanced MRI, Diffusion Weighted MRI and Multidetector CT of Colorectal Liver Metastases	NCT01255007	Colorectal Live...	MR imaging	18 Years -	University Health Network, Toronto
Adult and Paediatric Patient Radiation Doses From Multidetector Row Computed Tomography Scans: a National Survey	NCT01436006	Cancer		-	University of Palermo

Spots Global Cancer Trial Database for mdct

Every month we try and update this database with for mdct cancer trials from around the world to help patients and their families find trials that might be right for them.
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Spots Global Cancer Trial Database for mdct

Every month we try and update this database with for mdct cancer trials from around the world to help patients and their families find trials that might be right for them. We offer this 100% free of charge and do not endorse any of the trials listed here, we hope it helps you or a loved one.

Every month we try and update this database with for mdct cancer trials from around the world to help patients and their families find trials that might be right for them.
We offer this 100% free of charge and do not endorse any of the trials listed here, we hope it helps you or a loved one.