Practical Aspects of novel MRI Techniques in Neuroradiology: Part 2 - Acceleration Methods and Implications for Individual Regions. / Praktische Aspekte neuerer MRT-Techniken in der Neuroradiologie: Teil 2 ­ Beschleunigungsverfahren und Regionen-spezifische Implikationen.

BACKGROUND: Recently introduced MRI techniques facilitate accelerated examinations or increased resolution with the same duration. Further techniques offer homogeneous image quality in regions with anatomical transitions. The question arises whether and how these techniques can be adopted for routine diagnostic imaging. METHODS: Narrative review with an educational focus based on current literature research and practical experiences of different professions involved (physicians, MRI technologists/radiographers, physics/biomedical engineering). Different hardware manufacturers are considered. RESULTS AND CONCLUSIONS: Compressed sensing and simultaneous multi-slice imaging are novel acceleration techniques with different yet complimentary applications. They do not suffer from classical signal-to-noise-ratio penalties. Combining 3 D and acceleration techniques facilitates new broader examination protocols, particularly for clinical brain imaging. In further regions of the nervous systems mainly specific applications appear to benefit from recent technological improvements. KEY POINTS: · New acceleration techniques allow for faster or higher resolution examinations.. · New brain imaging approaches have evolved, including more universal examination protocols.. · Other regions of the nervous system are dominated by targeted applications of recently introduced MRI techniques.. CITATION FORMAT: · Sundermann B, Billebaut B, Bauer J et al. Practical Aspects of novel MRI Techniques in Neuroradiology: Part 2 - Acceleration Methods and Implications for Individual Regions. Fortschr Röntgenstr 2022; 194: 1195 - 1203.

Practical Aspects of novel MRI Techniques in Neuroradiology: Part 1-3D Acquisitions, Dixon Techniques and Artefact Reduction. / Praktische Aspekte neuerer MRT-Techniken in der Neuroradiologie: Teil 1­3D, Dixon-Techniken und Artefaktreduktion.

BACKGROUND: Recently introduced MRI techniques offer improved image quality and facilitate examinations of patients even when artefacts are expected. They pave the way for novel diagnostic imaging strategies in neuroradiology. These methods include improved 3D imaging, movement and metal artefact reduction techniques as well as Dixon techniques. METHODS: Narrative review with an educational focus based on current literature research and practical experiences of different professions involved (physicians, MRI technologists/radiographers, physics/biomedical engineering). Different hardware manufacturers are considered. RESULTS AND CONCLUSIONS: 3D FLAIR is an example of a versatile 3D Turbo Spin Echo sequence with broad applicability in routine brain protocols. It facilitates detection of smaller lesions and more precise measurements for follow-up imaging. It also offers high sensitivity for extracerebral lesions. 3D techniques are increasingly adopted for imaging arterial vessel walls, cerebrospinal fluid spaces and peripheral nerves. Improved hybrid-radial acquisitions are available for movement artefact reduction in a broad application spectrum. Novel susceptibility artefact reduction techniques for targeted application supplement previously established metal artefact reduction sequences. Most of these techniques can be further adapted to achieve the desired diagnostic performances. Dixon techniques allow for homogeneous fat suppression in transition areas and calculation of different image contrasts based on a single acquisition. KEY POINTS: · 3D FLAIR can replace 2 D FLAIR for most brain imaging applications and can be a cornerstone of more precise and more widely applicable protocols.. · Further 3D TSE sequences are increasingly replacing 2D TSE sequences for specific applications.. · Improvement of artefact reduction techniques increase the potential for effective diagnostic MRI exams despite movement or near metal implants.. · Dixon techniques facilitate homogeneous fat suppression and simultaneous acquisition of multiple contrasts.. CITATION FORMAT: · Sundermann B, Billebaut B, Bauer J et al. Practical Aspects of novel MRI Techniques in Neuroradiology: Part 1-3D Acquisitions, Dixon Techniques and Artefact Reduction. Fortschr Röntgenstr 2022; 194: 1100 - 1108.

Fibroadenomas and breast carcinoma: a possible answer to a frequently asked question. A pictorial essay.

Fibroadenomas (FAs) are the most frequently encountered benign breast lesions in young women and due to the age of the patients, they are usually diagnosed by ultrasound. Although they rarely undergo malignant transformation, the patients remain concerned about the possibility of malignant transformation. The aim of this pictorial essay is to illustrate the appearance of classic and complex fibroadenomas, to discuss the risk factors and to highlight the imaging characteristics that raise the suspicion of malignant transformation. In other words, we try to answer, according to our experience and literature data, to a frequently asked question in daily practice: "Is there any risk thatmy fibroadenoma will become malignant?"

Breast cystic lesions: Not so simple after all? An ultrasonographic tactical approach.

A wide spectrum of breast diseases breast diseases have or exhibit at some point in their natural history a complex cystic aspect. Through the lens of B-mode and Doppler ultrasound with sonoelastographic augmentation, conditions ranging from the utterly benign fibrocystic change to the most intricate encysted or cystically degenerated cancerous lesions, are covered in detail in this review. The aim of this paper is to familiarize the practitioner with the ultrasonographic aspects of complex breast cystic masses and to implement a gradual, strategic approach in the diagnostic algorithm.