ECR_2015

EUROPEAN HOSPITAL Vol 24 Issue 1/15 22 EH @ ECR At work with a new generation 1.2-T MRI scanner Value in an open platform Cardiac CT scanner drops radiation d Report: Mélisande Rouger Musculoskeletal- and neuro-radiolo- gist Dr Moya works at San Carlos Hospital, a public facility, and at the Advanced Surgery Centre of Virgén de la Paloma Hospital, a private institution where an Oasis 1.2-T MRI Scanner was recently installed. Open from 8am to 10pm her depart- ment scans 20 to 24 patients a day, mainly for ambulatory care. Dr Moya: ‘A high percentage of the patients suffer from claustro- phobia, and a significant number of patients prefer to be examined in an open-platform, probably because they feel more comfortable here than in a confined scanner. ‘The Oasis platform offers high field imaging, so we mainly per- form MSK and nervous system examinations. Most of our patients come from traumatology and neu- rology. We also perform abdomen and mammography examinations, mainly in patients with claustropho- bia. We rarely image obese patients; this population is still low in our country.’ Why did the Centre choose Hitachi’s equipment? ‘Ours is the first Oasis system installed at a private facility in Madrid. Only one public hospital had previously been equipped in the capital. This means we can now also offer this service to patients coming from the private sector, who represent a large number of patients in Spain.’ What is specifically good about working with Oasis? ‘Oasis is useful for any study that requires high field imaging. The wide open-platform enables us to perform high field studies in patients with claustrophobia who otherwise would never be able to benefit from, for instance, specif- ic abdomen, liver or whole-body MR examinations, unless they are sedated. ‘The open-platform is very conveni- ent. I have been working with the system since last September, and I find it very good not only for patients with claustrophobia but also for children. Young patients who undergo an examination in a confined bore tend to move because they are nervous. If one of their parents can sit and chat with them during the examination, it helps them relax. Putting them at ease definitely reduces the risk of repeat- ed scans, decreases scan time and provides higher quality diagnostic images.’ Oasis 1.2-T features susceptibility weighted imaging (SWI), spectros- copy and perfusion, which all play an important role in neurological exams. For MSK examinations, the open platform architecture helps to acquire an image radially. Many patients will voluntarily or involun- tarily move during an examination. The flow and motion compensation technique of radial acquisition sig- nificantly improves image quality and expedites interpretation with- out having to sedate patients. What could be changed in the future? ‘I am not sure how Oasis is going to develop further, but I think tech- nology will soon enable the magnet power to increase to 1.5 or 2-T, which would definitely improve the offer for open high-field equipment. However, for the moment, I believe developments will rather focus on short bore MR equipment.’ As Hitachi deploys its new generation of Oasis 1.2-T MRI scanners throughout Europe, our Madrid correspondent asked Dr Manuela Jorquera Moya about her experiences with the new scanner over the past few months Further big plus: Even patients with AF and high heart rates can be scanned Breasts STIR axial ClinicalimagesbycourtesyofDrJorqueraMoya Orbits STIR axialSkull FLAIR axial Hips coronal arthrography Knee magnetic resonance arthrography Wrist magnetic resonance arthrography Dr Manuela Jorquera Moya works at San Carlos Hospital, one of Madrid’s largest healthcare facilities, and at the Advanced Surgery Centre of the Virgén de la Paloma Hospital A British Society of Cardiac Imaging (BSCI) survey has confirmed that Toshiba’s Aquilion One scanner not only delivers exceptionally low radi- ation doses for cardiac CT, but also widens the scope of diagnostics in Cardiac CT because even patients with conditions eliminating them from a CT exam before this machine arrived can now be scanned. An incredible 40% lower radiation dose ‘This data is possibly the most powerful I can show about the Aquilion One with the PureVision detector,’ said Russell Bull MD, Consultant Radiologist at the Royal Bournemouth Hospital, Dorset, United Kingdom, where the study data was collected. Over a one- month period at the hospital, an unselected patient population was surveyed. The group included all patients, as well as those with atrial fibrillation and high body mass index. The radiation dose of around 1mSv for an unselected population is amongst the lowest ever recorded for cardiac CT. ‘I would have been happy with 20% reduction in radia- tion dose compared to the previous survey,’ Dr Bull said, when present- ing the BSCI findings. ‘In fact, there was a 40% reduction in dose. This is extraordinary as the Aquilion One was already a low dose scanner in the previous survey.’ Better imaging with high contrast Adaptive Iterative Dose Reduction in 3D (AIDR 3D) is integrated in the Aquilion Vision. This not only mini- mises image noise, thereby enabling radiologists to lower the radiation dose, but also assures high diagnos- tic quality images. Combined with the wide detector array of 16 cm., this CT scan- ner enables vol- umetric scan- ning, where entire organs can be captured with perfect tem- poral uniformity and completely free from z-axis misregistration at a rotation speed of 0.275 seconds. As a result Dr Bull said: ‘The image quality is actually much better, which has to do with the combina- tion of the PureVision detector and the AIDR 3-D processing. We are seeing better images for 40% less radiation dose. With Aquilion One we can scan patients we wouldn’t even consider scanning on a con- ventional scanner.’ 4-D imaging and more With this Toshiba CT scan- ner time can be added as the fourth dimension paving the way for high-quality dynamic volume applications, or 4-D dynamic volume imaging,’ the manufacturer reports. ‘Each indi- vidual set of data, acquired in a dynamic volume, shows an exact moment in time, or the exact phase of contrast enhancement. Dr Bull also added that, the abil- ity to change the table speed on the fly with Variable Helical Pitch (vHP) is unique to Toshiba. This, for example, makes it easier for the technician to do a TAVI scan, Consultant radiologist Russell Bull joined the Royal Bournemouth Hospital in 2000, where a year later the UK’s first Toshiba Aquilion multi-slice CT was installed. The hospital has been the main UK reference site for Toshiba ever since. In 2009, the hospital again became the first in the UK to install the Aquilion One single rotation, single heartbeat cardiac CT scanner. Then, in 2012, a 128 slice Aquilion CxL was installed which also incorporates AIDR 3D technology. Dr Bull initially worked as a general cross sectional radiologist and started a cardiac CT service at Bournemouth in 2004, using a Toshiba Aquilion 16. For the past four years he has worked almost exclusively as a cardiothoracic radiologist, splitting his time between cardiac CT and MRI.

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