Institut für diagnostische und interventionelle Radiologie (Institut für Röntgendiagnostik)
Refine
Has Fulltext
- yes (21)
Is part of the Bibliography
- yes (21)
Year of publication
- 2023 (21) (remove)
Document Type
- Journal article (19)
- Doctoral Thesis (2)
Language
- English (21) (remove)
Keywords
- magnetic resonance imaging (3)
- CT angiography (2)
- cartilage (2)
- computed tomography (2)
- translational research (2)
- AMADEUS (1)
- Bildgebendes Verfahren (1)
- Echtzeit (1)
- Herzfunktion (1)
- Herzmuskel (1)
- KOOS (1)
- Kernspintomografie (1)
- Lungenembolie (1)
- PROM (1)
- X-ray computed (1)
- ankle (1)
- aorta (1)
- arthrography (1)
- biomedical engineering (1)
- bone (1)
- bone remineralization (1)
- bone replacement material (1)
- breast cancer imaging (1)
- cancellous bone (1)
- cancer imaging (1)
- carcinoma (1)
- cardiovascular MRI (1)
- chiasma antebrachii (1)
- chondral defect (1)
- cine loop (1)
- computational neural networks (1)
- computed tomography angiography (CTA) (1)
- continuous extracorporeal femoral perfusion model (1)
- conventional imaging (1)
- convolution kernel (1)
- correlation (1)
- cross-sectional imaging (1)
- digital subtraction angiography (DSA) (1)
- drillability (1)
- dual-energy CT (1)
- dual-source CT (1)
- electrical and electronic engineering (1)
- experimental models of disease (1)
- femoral arteries (1)
- flexor digitorum superficialis (1)
- flexor tendon (1)
- fluoroscopy (1)
- fracture (1)
- giant cell arteritis (1)
- heart (1)
- high tibial osteotomy (1)
- imaging (1)
- intravascular ultrasound (IVUS) (1)
- knee (1)
- large animal models (1)
- late enhancement (1)
- late gadolinium-enhancement (1)
- lymphatic metastasis (1)
- machine learning (1)
- magnesium phosphate cement (1)
- multiple myeloma (1)
- musculoskeletal system (1)
- neoadjuvant therapies (1)
- neuronavigation (1)
- non-small-cell lung (1)
- novel human cadaveric perfusion model (1)
- obesity (1)
- ophthalmic artery (1)
- optic nerve (1)
- orbit (1)
- organoid (1)
- osteoarthritis (1)
- pedicle screws (1)
- perfusion map (1)
- photon-counting (1)
- photon-counting CT (1)
- photon-counting computed tomography (CT) (1)
- photon-counting-detector CT (1)
- phytic acid (1)
- pig (1)
- positive nodal status (1)
- post-neoadjuvant therapies (1)
- preclinical research (1)
- pulmonary embolism (1)
- radiation dosage (1)
- radiation dose (1)
- radiation dose reduction (1)
- radiology (1)
- radiomics (1)
- real-time imaging (1)
- reproducibility of results (1)
- research infrastructure (1)
- small pixel effect (1)
- small-cell lung (1)
- spectral CT (1)
- spectral imaging (1)
- spine (1)
- spiral trajectory (1)
- three-dimensional imaging (1)
- tomography (1)
- ultrahigh resolution (1)
- ultrahigh-field MRI (1)
- vertebral pedicles (1)
- virtual non-contrast (1)
- whole-body imaging (1)
Institute
- Institut für diagnostische und interventionelle Radiologie (Institut für Röntgendiagnostik) (21)
- Institut für Anatomie und Zellbiologie (8)
- Klinik und Poliklinik für Allgemein-, Viszeral-, Gefäß- und Kinderchirurgie (Chirurgische Klinik I) (3)
- Institut für diagnostische und interventionelle Neuroradiologie (ehem. Abteilung für Neuroradiologie) (2)
- Klinik und Poliklinik für Unfall-, Hand-, Plastische und Wiederherstellungschirurgie (Chirurgische Klinik II) (2)
- Lehrstuhl für Orthopädie (2)
- Medizinische Klinik und Poliklinik II (2)
- Abteilung für Funktionswerkstoffe der Medizin und der Zahnheilkunde (1)
- Augenklinik und Poliklinik (1)
- Deutsches Zentrum für Herzinsuffizienz (DZHI) (1)
This work deals with the acceleration of cardiovascular MRI for the assessment
of functional information in steady-state contrast and for viability assessment
during the inversion recovery of the magnetization. Two approaches
are introduced and discussed in detail. MOCO-MAP uses an exponential
model to recover dynamic image data, IR-CRISPI, with its low-rank plus
sparse reconstruction, is related to compressed sensing.
MOCO-MAP is a successor to model-based acceleration of parametermapping
(MAP) for the application in the myocardial region. To this end, it
was augmented with a motion correction (MOCO) step to allow exponential
fitting the signal of a still object in temporal direction. Iteratively, this
introduction of prior physical knowledge together with the enforcement of
consistency with the measured data can be used to reconstruct an image
series from distinctly shorter sampling time than the standard exam (< 3 s
opposed to about 10 s). Results show feasibility of the method as well as
detectability of delayed enhancement in the myocardium, but also significant
discrepancies when imaging cardiac function and artifacts caused already by
minor inaccuracy of the motion correction.
IR-CRISPI was developed from CRISPI, which is a real-time protocol
specifically designed for functional evaluation of image data in steady-state
contrast. With a reconstruction based on the separate calculation of low-rank
and sparse part, it employs a softer constraint than the strict exponential
model, which was possible due to sufficient temporal sampling density via
spiral acquisition. The low-rank plus sparse reconstruction is fit for the use on
dynamic and on inversion recovery data. Thus, motion correction is rendered
unnecessary with it.
IR-CRISPI was equipped with noise suppression via spatial wavelet filtering.
A study comprising 10 patients with cardiac disease show medical
applicability. A comparison with performed traditional reference exams offer
insight into diagnostic benefits. Especially regarding patients with difficulty
to hold their breath, the real-time manner of the IR-CRISPI acquisition provides
a valuable alternative and an increase in robustness.
In conclusion, especially with IR-CRISPI in free breathing, a major acceleration
of the cardiovascular MR exam could be realized. In an acquisition
of less than 100 s, it not only includes the information of two traditional
protocols (cine and LGE), which take up more than 9.6 min, but also allows
adjustment of TI in retrospect and yields lower artifact level with similar
image quality.