A-511 fMRI in epilepsy
N. Bargalló | Sunday, March 10, 16:00 – 17:30 / Room G/H
Functional MRI (fMRI) is a non-invasive tool that is capable to detect the subtle homodynamic changes produced in regional brain activation. The main fMRI clinical application until now is localization and evaluation of brain eloquent areas in surgical planning of brain pathology. fMRI application in epilepsy patients are language lateralization, memory function assessment and localization of ictal and interictal BOLD changes. There are several factors that can influence the results of a fMRI experiment such as the scan noise for the rest condition, the simplicity of the task performance, the monitoring of the experiment during the exam, how to achieve a real baseline condition and the most important, to use the most specific paradigm that would activate the selected brain areas. In practical approach, one must be aware that sometime fMRI studies are applied in paediatric or impaired cognitive epilepsy population when deciding the language or memory paradigm, and is recommended to use multiple and feasibility tasks to assure the results. fMRI for language lateralization is currently used in the clinical practice and provides comparable results to the intracarotid amobarbital test (IAT). In fMRI studies for memory function assessment, results show changes in epileptic patients, but further studies are required to validate this technique to an individual level. A new application is ictal or interictal fMRI with EEG recorded that provide more detailed information about simultaneously electrographic and homodynamic changes in the seizure process, with encouraging results for epileptogenic area localization and propagation patterns.
A-245 Pre-therapeutic radiological evaluation
J. Raupach, O. Renc, P. Hoffmann, J. Zizka; | Saturday, March 9, 08:30 – 10:00 / Room N/O
Endovascular abdominal aortic aneurysm repair (EVAR) was introduced over 20 years ago to primarily treat old and sick patients. Due to technical improvements and satisfactory clinical results of this technology, the number of patients treated with stent-grafts is steadily increasing. There is also tendency to use this therapy for ruptured abdominal aortic aneurysms. Pre-operative assessment of aortic morphology regarding suitability for stent-graft implantation is, therefore, an important challenge for every radiologist now. Main limitation of EVAR is unfavourable anatomy of landing zones and access vessels. Gold standard for EVAR planning is contrast-enhanced CTA. Alternative modality for patients with contraindications for CT, such as renal impairment, is unenhanced MR with steady-state free precession sequence. A number of 2D or 3D reconstructions are generated to provide information about the aneurysm morphology. Dedicated vessel analysis and planning software can be applied. Usually, axial images and thin MPR reconstructions are sufficient in emergent cases. Proper stent selection is a domain of operator and is still matter of his/her experience. The planning procedure can be subdivided into 4 different sections: infrarenal neck, aneurysmal sac, aortic bifurcation and access vessels. There are several critical and rules which must be obeyed during the evaluation process and general radiologists should be aware of. The presentation will review main inclusion and exclusion criteria for EVAR.
A-028 Ultrasound elastography
A. Athanasiou | Thursday, March 7, 16:00 – 17:30 / Room F2
Breast ultrasound elastography provides information about tissue elasticity Young modulus E = s / e, where s is the compression (stress) and e is the deformation (strain) of the tissue. It is a complementary tool to breast ultrasonography, easily performed in clinical practice. Two elasticity modes are currently available: strain imaging, where manual compression is applied to the ultrasound probe and tissue displacement is registered; tissue deformation is then calculated by means of dedicated software providing real-time elasticity images (color- or grey-coded) superimposed on B-mode imaging. This is a qualitative or semi-quantitative mode. Shear wave imaging, where US probe is used to induce mechanical vibrations using acoustic radiation force generating local tissue displacement. This mode provides quantitative information about either tissue displacement velocity or tissue stiffness itself in kPa. Functional information provided by elasticity imaging can be particularly useful for BIRADS 3 or 4a lesions. Various studies indicate that elasticity combined to B-mode imaging can improve breast ultrasound specificity up to 75-88%. False negative findings may be encountered in case of “soft” lesions (mucinous, medullary or cystic carcinomas) or inflammatory cancers. Differentiation between echogenic cysts and homogeneous solid lesions (such as fibroadenomas) can be improved as cystic features are usually specific in elasticity imaging. Iso-echoic lesions such as infiltrating lobular carcinomas may be better delimitated. Lymph-node characterization and microcalcification assessment can be improved, although few data are available and need further validation. 3D elastography is actually in progress and would be useful in monitoring response to neoadjuvant treatment.
A-024 Finding the time and resources in the radiology department
J. del Cura | Thursday, March 7, 16:00 – 17:30 | Room F1
One of the problems of undergraduate teaching of Radiology is the lack of time for teaching, due to competition for resources with other academic disciplines. Available classroom time and hours of practice are often insufficient to teach the increasingly complex modern Radiology. Also, the availability of financial resources to hire staff or access to educational facilities is competitive and limited, especially in a context of economic crisis. A good solution is to shift the paradigm of education, changing theoretical teaching into self-learning by students. This change allows to free class time to effectively teach Radiology. Classes are converted in workshops, doubt-solving sessions and problem-based learning, all of which matches better with a visual discipline like Radiology. Both on-line classes and e-learning can be useful for this purpose. This kind of teaching also makes Radiology a very attractive discipline for Medicine students. Also, Radiology practices can be carried out using custom computer applications. The lack of professors (and time) for practices can be solved with the help of residents, who are willing to participate as they are more prone to understand the learning needs of the students. Finally, the lack of economic resources makes it is necessary to seek alliances: with the industry, professional associations or with professors from other universities, sharing resources. Internet also provides free materials that can be used to teach.
B-0198 Crohn’s disease activity: correlation of inflammatory mediators with overall small-bowel motility
S. Bickelhaupt, S. Pazahr, J.M. Froehlich, R. Cattin, H. Bouquet, G. Rogler, P. Frei, A. Boss, M. Patak | Thursday, March 7, 14:00 – 15:30 / Room E2
Purpose: Active Crohn’s disease (CD) increases the level of inflammatory markers of which C-reactive protein (CRP) and calprotectin are commonly used to monitor disease activity. The aim was to evaluate the correlation between CRP and calprotectin levels and overall small bowel motility in patients with Crohn’s disease assessed with MRI.
Methods and Materials: 13 patients with Crohn’s disease (4f/9m, mean 42y) were included in this IRB-approved prospective study. MRI (1.5-T, Philips Achieva) was performed after a 1-h preparation of 1000 ml Mannitol-Solution (3%). Cine T2w-2D-SSFP motility acquisitions (TR 2.47/TE 1.23/250ms slice repetition time) were performed in free breathing over 69-84sec. Randomly chosen small-bowel segments were analysed in two abdominal quadrants using dedicated MR-motility assessment software (Motasso). Contraction frequency, amplitude, luminal diameter and amplitude diameter ratio (occlusion ratio, ADR) were evaluated as well as CRP (ngl/ul) and Calprotectin (ug/g) levels. Pearson’s correlation was calculated.
Results: Calprotectin was determined in mean 12 days (SEM±10.09) before, CRP 15 days (SD±28.80) before MRI. A significant inverse linear correlation was found between the contraction frequency and both the level of CRP (r=-0.701, p=0.008) and calprotectin (r=-0.805, p=0.001). Expansion of the mean small bowel diameter significantly correlated with calprotectin levels (r=0.857, p=<0.001) but not with CRP (r=0.447, p=0.126). The absolute amplitude of the contractions did not correlate neither with the level of CRP (r=-0.527, p=0.064) nor with calprotectin (r=-0.612, p=0.026). The ratio describing relative luminal occlusion during contraction (ADR) significantly correlated with calprotectin (r=0.736, p=0.004) and with CRP (r=0.577, p=0.039).
Conclusion: Alterations of overall small bowel motility during active phases of CD significantly correlate with the level of calprotectin and CRP.
B-0313 Muscle elastography in patients affected by multiple sclerosis
G. Illomei, G. Spinicci, M. Arru, M. Marrosu | Friday, March 8, 10:30 – 12:00 / Room E1
Purpose: The purpose of the study was to investigate the use of real time elastography in evaluating the muscle stiffness comparing to Ashworth scale. The aim of the study is to create an elastography score for MS patients.
Methods and Materials: We investigated 101 MS patients, 61 women and 40 men. Disability score assessed by Expanded Disability Status Score of Kurtzke scale ranged from 0 and 8.5 with a mean value of 3.5. In all patients a neurological examination was performed and referred to Ashworth scale score by a neurologist. All patients underwent real time elastography on Esaote my Lab Twice with transducer with a high frequency probe 4-13 MHz. The muscles examined were quadriceps of both legs. The study was a double-blinded one, and it was approved by local Ethic Committee.
Results: There was full concordance between the Ashworth scale evaluation and elastography score. However, patients classified as score 0 in the Ashworth scale can be spitted in 0a (total normality of muscle fibers elasticity) and 0b (initial compromising of muscle fibers elasticity). The main result of the study was the creation of an elastography score of muscle stiffness in MS patients that can be compared with Ashworth scale.
Conclusion: Ashworth scale is at present the only method to evaluate muscle stiffness in MS patients. Our study demonstrated for the first time that it is possible to have an imaging method to assess this clinical examination giving new possibilities to follow the evolving of the disease in these patients.
During and after ECR 2013, one of the questions we were asked most frequently by viewers of our online streaming service, ECR Live, was ‘where can I watch a recording of session x?’
At the time, we weren’t able to give any definite answers. We were happy that so many people were interested, just as we were delighted with the success of the project, which saw more than 1,400 lectures broadcast online in 13 separate live streams, but we didn’t have firm plans for what to do with the recordings. Now we do.
We’ve gathered together as many lectures from ECR 2013 as possible and we’ll be presenting them in a series called ‘ECR Rec’, here on the ESR blog throughout the coming months. Naturally, we wanted to make sure to obtain the speakers’ permission before including their material, so the collection only includes lectures from speakers who chose to be a part of the project, but it’s a great cross-section of the ECR 2013 programme, and we’re really proud to be able to present all of the videos completely free of charge.
You can find the first two recordings in the series here:
ECR 2013 Rec: Muscle elastography in patients affected by multiple sclerosis #B-0313 #SS510
ECR 2013 Rec: Crohn’s disease activity: correlation of inflammatory mediators with overall small-bowel motility #B-0198 #SS201a
Keep a close eye on the ESR Blog to see each recording as it’s published.
If you have any comments about the project or would like to request a particular lecture, please let us know in the comments section below.
As every year, the ESR presidency changed hands at the European Congress of Radiology in March, with the new president, Prof. Guy Frija, from Paris, taking the reins from Prof. Gabriel P. Krestin. At the same time, the ECR 2014 Congress President, Prof. Valentin E. Sinitsyn, from Moscow, took over from Prof. José I. Bilbao as chairman of the Congress Committee.
In addition to these regular changes, a number of other positions on the Executive Council have been filled by new faces. First, Prof. Bernd Hamm, from Berlin, has moved up the chain into Prof. Sinitsyn’s position as 1st Vice-Chairperson of the Congress Committee, with Prof. Katrine Åhlström Riklund, from Umea, Sweden, elected to the role of 2nd Vice-Chairperson.
The optimisation and justification of procedures is vital when using CT as an imaging modality; particularly on children, who are more sensitive to ionising radiation than adults. Therefore, it is crucial that all those who use CT understand the physics behind the equipment and ultimately use this understanding to minimise the potential risks while maximising the potential benefits to each individual patient. Patients should also be informed of the risks and benefits of undergoing a CT scan. World-renowned experts will explain these issues in detail during a Special Focus Session at ECR 2013.
“Not all radiologists and technicians are aware of the latest dose reduction strategies. Some are not necessarily so well-informed and perhaps do not realise how important this is. We believe that it is a question of trying to get everybody to a certain level of knowledge and expertise,” said Dr. Catherine Owens, paediatric radiologist and CT unit lead at Great Ormond Street Children’s Hospital in London, U.K.