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Improved visualization of hepatic tumors in magnetic resonance-guided thermoablation using T1-inversion-recovery imaging with variable inversion time. Eur Radiol 2023; 33:7015-7024. [PMID: 37133519 PMCID: PMC10511564 DOI: 10.1007/s00330-023-09696-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 03/14/2023] [Accepted: 03/20/2023] [Indexed: 05/04/2023]
Abstract
OBJECTIVES In magnetic resonance (MR)-guided interventions, visualization of hepatic lesions may be difficult using standard unenhanced T1-weighted gradient-echo volume-interpolated breath-hold (VIBE) sequence due to low contrast. Inversion recovery (IR) imaging may have the potential to improve visualization without the necessity to apply contrast agent. METHODS Forty-four patients (mean age 64 years, female 33%) scheduled for MR-guided thermoablation due to liver malignancies (hepatocellular carcinoma or metastases) were prospectively included in this study between March 2020 and April 2022. Fifty-one liver lesions were intra-procedurally characterized before treatment. Unenhanced T1-VIBE was acquired as part of the standard imaging protocol. Additionally, T1-modified look-locker images were acquired with eight different inversion times (TI) between 148 and 1743 ms. Lesion-to-liver contrast (LLC) was compared between T1-VIBE and IR images for each TI. T1 relaxation times for liver lesions and liver parenchyma were calculated. RESULTS Mean LLC in T1-VIBE sequence was 0.3 ± 0.1. In IR images, LLC was highest at TI 228 ms (1.04 ± 1.1) and significantly higher compared to T1-VIBE (p < 0.001). In subgroup analysis, lesions of colorectal carcinoma showed the highest LLC at 228 ms (1.14 ± 1.4), and hepatocellular carcinoma showed the highest LLC at 548 ms (1.06 ± 1.16). T1-relaxation times in liver lesions were higher compared to the adjacent liver parenchyma (1184 ± 456 vs. 654 ± 96 ms, p < 0.001). CONCLUSIONS IR imaging is promising to provide improved visualization during unenhanced MR-guided liver interventions compared to standard T1-VIBE sequence when using specific TI. Low TI between 150 and 230 ms yields the highest contrast between liver parenchyma and malignant liver lesions. CLINICAL RELEVANCE STATEMENT Improved visualization of hepatic lesions during MR-guided percutaneous interventions using inversion recovery imaging without the necessity to apply contrast agent. KEY POINTS • Inversion recovery imaging is promising to provide improved visualization of liver lesions in unenhanced MRI. • Planning and guidance during MR-guided interventions in the liver can be performed with greater confidence without necessity to apply contrast agent. • Low TI between 150 and 230 ms yields the highest contrast between liver parenchyma and malignant liver lesions.
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T2-Weighted MRI following TCPC: Fontan Patients with Type-4 Classification of the Thoracic Lymphatic Channels Show a Lower Exercise Capacity. Thorac Cardiovasc Surg 2022. [DOI: 10.1055/s-0042-1743001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Hydrojet-Based Delivery of IPSC-Derived Autologous Cardiomyocytes into the Myocardium. Thorac Cardiovasc Surg 2021. [DOI: 10.1055/s-0041-1725844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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How to Accelerate Cardiac MRI Examination: Cine-Sequences with Compressed Sensing (CS) Technology (Preliminary Results). Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1628361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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5
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Schnelle kontinuierliche multiarterielle MRT der Leber unter freier Atmung. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ultraschnelle abdominelle MR Bildgebung mit einem neuartigen 60-Kanal Empfängerspulensystem. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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4D MRT-Bildgebung der Leber: Kontinuierliche Beurteilung der KM-Dynamik unter freier Atmung. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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8
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Simultane Mehrschichtakquisition zur Beschleunigung der MR-Diffusionsbildgebung an der Prostata – eine Machbarkeitsstudie zur Beurteilung der klinischen Anwendung. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Korrelation des auf die Körperoberfläche normalisierten rechtsatrialen Volumens mit dem rechtsventrikulären enddiastolischen Druck. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1599017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4D-Flussmessung in der kardialen MRT: Validierung bei Patienten mit angeborenem Herzfehler. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1599024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Quantifizierung von Aorten- und Pulmonalklappenvitien in der kardialen MRT - wie relevant ist die genaue Position der Messebene? Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1599026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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MR Image Reconstruction Using a Combination of Compressed Sensing and Partial Fourier Acquisition: ESPReSSo. IEEE TRANSACTIONS ON MEDICAL IMAGING 2016; 35:2447-2458. [PMID: 27295659 DOI: 10.1109/tmi.2016.2577642] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A Cartesian subsampling scheme is proposed incorporating the idea of PF acquisition and variable-density Poisson Disc (vdPD) subsampling by redistributing the sampling space onto a smaller region aiming to increase k-space sampling density for a given acceleration factor. Especially the normally sparse sampled high-frequency components benefit from this sampling redistribution, leading to improved edge delineation. The prospective subsampled and compacted k-space can be reconstructed by a seamless combination of a CS-algorithm with a Hermitian symmetry constraint accounting for the missing part of the k-space. This subsampling and reconstruction scheme is called Compressed Sensing Partial Subsampling (ESPReSSo) and was tested on in-vivo abdominal MRI datasets. Different reconstruction methods and regularizations are investigated and analyzed via global (intensity-based) and local (region-of-interest and line evaluation) image metrics, to conclude a clinical feasible setup. Results substantiate that ESPReSSo can provide improved edge delineation and regional homogeneity for multidimensional and multi-coil MRI datasets and is therefore useful in applications depending on well-defined tissue boundaries, such as image registration and segmentation or detection of small lesions in clinical diagnostics.
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Multi-phase Whole Heart bSSFP – eine Möglichkeit zur simultanen Bestimmung kardialer Volumina sowie der Koronararterien? ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Messzeitreduktion in der Leber-Diffusionsbildgebung mittels simultaner Mehrschichttechnik: Vergleich verschiedener Präparationstechniken und Beschleunigungsfaktoren. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Intra-Patienten-Vergleich von SNR und Bildqualität in der arteriellen Leber-MRT: CAIPIRINHA-Dixon-TWIST VIBE vs. Standard T1-VIBE. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Radiale isotrope 3D VIBE mit retrospektivem self-gating: Klinische Evaluation in der kontrastmittelverstärken MRT-Bildgebung der Leber. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Beschleunigte Diffusionsbildgebung der Leber mittels simultaner Mehrschicht (SMS)-Technik: Einfluss des Atemschemas auf qualitative und quantitative Bildparameter. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Effekt der zeitlichen Auflösung auf die diagnostische Genauigkeit der dynamischen kontrastverstärkten MRT zur Detektion von potentiell malignen Prostataläsionen. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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MR-basedin vivofollow-up study of Achilles tendon volume and hydration state after ankle-loading activity. Scand J Med Sci Sports 2015; 26:1200-8. [DOI: 10.1111/sms.12550] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/10/2015] [Indexed: 12/01/2022]
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Chemical-Shift MR-Bildgebung zur Detektion braunen Fettgewebes – technische Durchführbarkeit und direkter Vergleich zur 18F-FDG-PET mittels kombinierter PET/MRT. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1551226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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MRT des Annulus fibrosus und der kartilaginären Endplatte lumbaler Bandscheiben mittels ultrakurzen Echozeiten: Quantifizierung degenerativer Veränderungen mittels offresonanten Sättigungsratios. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Dynamic MR urography in children with uropathic disease with a combined 2D and 3D acquisition protocol--comparison with MAG3 scintigraphy. Br J Radiol 2014; 87:20140426. [PMID: 25270833 DOI: 10.1259/bjr.20140426] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE The aim of this study was to evaluate combined two-dimensional (2D) and three-dimensional (3D) dynamic MR urography with respiratory compensation in children with anomalies of the genitourinary tract, allowing for computation of split renal function and assessment of urinary tract obstruction. METHODS Dynamic MR urography was performed in 53 children (3 months-16 years of age) with anomalies of the urinary tract. A protocol for dynamic MR urography and nephrography was implemented at 1.5 T using a navigator-triggered 2D TurboFLASH sequence. Split renal function and contrast-medium excretion were assessed after the bolus injection of 0.05 mmol kg(-1) body weight of gadolinium dimeglumine. In the excretory phase, a 3D gradient-echo data set with high spatial resolution was acquired. In all patients, mercaptoacetyltriglycine (MAG3) scintigraphy was obtained as a reference standard. RESULTS In all children, dynamic MR nephrography and urography could be performed with excellent compensation of breathing artefacts providing region of interest analysis in nearly identical kidney positions. The assessment of contrast-medium excretion into the ureter allowed for discrimination of functional from non-functional stenosis. Split renal function assessed by MRI showed an excellent agreement with the MAG3 reference standard with a correlation coefficient r = 0.95. Additionally recorded 3D data sets offered good depiction of anatomical anomalies in all patients. CONCLUSION The proposed protocol provides a robust technique for assessment of ureteral obstruction and split renal function with compensation of breathing artefacts, short post-processing time and excellent 3D spatial resolution. ADVANCES IN KNOWLEDGE The combined protocol of 2D and 3D MR urography is an efficient technique for assessment of renal morphology and function.
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Multi Echo Turbospinecho T2 mapping in der kardialen MRT zum Ödemnachweis bei Myokardinfarkt. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Entwicklung und Validierung eines automatisierten Verfahrens zur unüberwachten Detektion maligner Läsionen der Prostata auf multiparametrischen PET/MRT-Datensätzen. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Einfluss körperlichen Aktivität auf T1- und T2*- Relaxationszeiten der Achillessehne – Eine 3T MRT-Untersuchung an gesunden Probanden. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Charakterisierung von Kopf-Hals-Tumoren mittels Diffusionsbildgebung und FDG-PET an einem simultanen Ganzkörper-MR/PET. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Evaluation von T1rho als potentieller MR-Biomarker der Leberzirrhose: Vergleich von gesunden Probanden und Patienten mit Leberzirrhose. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Funktionelle Bildgebung von Transplantatnieren mittels Arterial Spin Labeling (ASL) MRT bei 1.5T und 3T: Ergebnisse bei 105 Patienten. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Arterial spin labelling perfusion MRI of breast cancer using FAIR TrueFISP: Initial results. Clin Radiol 2013; 68:e123-7. [DOI: 10.1016/j.crad.2012.10.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2012] [Revised: 10/08/2012] [Accepted: 10/11/2012] [Indexed: 10/27/2022]
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MR-basierte Korrektur der Atembewegung bei simultan akquirierten in-vivo PET-Daten des Körperstamms. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1329790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Thyroid Perfusion Imaging as a Diagnostic Tool in Graves’ Disease – Arterial Spin Labeling Magnetic Resonance Imaging vs. Colour-Coded Doppler Ultrasound. ROFO-FORTSCHR RONTG 2012; 184:1138-43. [DOI: 10.1055/s-0032-1325342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Automated volumetric assessment of the Achilles tendon (AVAT) using a 3D T2 weighted SPACE sequence at 3T in healthy and pathologic cases. Eur J Radiol 2012; 81:1612-7. [DOI: 10.1016/j.ejrad.2011.04.016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2011] [Accepted: 04/06/2011] [Indexed: 10/18/2022]
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Wasser-selektive Bildgebung von Sehnen, Bändern und kortikalem Knochen: Möglichkeiten modifizierter UTE-Sequenzen in der MRT des muskulo-skelettalen Systems. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Wasser-Makromolekül-Wechselwirkungen bei Achillessehnen-(Para-) Tendinopathie: Off-resonance saturation-(OS)-Transfer bei 3T im Vergleich zu klinischem Befund, Standard-MRT und Ultraschall. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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MR-basierte Korrektur der Atembewegung bei simultan akquirierten in-vivo PET-Daten des Körperstamms. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kernspintomographische Darstellung von Sehnen, Bändern und Menisken im Positivkontrast mittels Double-Echo-Steady-State (DESS) Sequenz - eine Machbarkeitsstudie. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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38
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Arterial Spin Labeling (ASL) Perfusionsbildgebung von Transplantatnieren bei 3T. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Kontrastmittelfreie quantitative Messung der Perfusion der Unterschenkelmuskulatur mittels MR-Spektroskopie-basierter Arterial Spin Labeling (ASL) Technik: FAIR-PRESS. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Magnetization transfer in human Achilles tendon assessed by a 3D ultrashort echo time sequence: quantitative examinations in healthy volunteers at 3T. ROFO-FORTSCHR RONTG 2011; 183:1043-50. [PMID: 21986866 DOI: 10.1055/s-0031-1281742] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
PURPOSE Magnetization transfer contrast (MTC) imaging provides insight into interactions between free and bounded water. Newly developed ultrashort echo time (UTE) sequences implemented on whole-body magnetic resonance (MR) scanners allow MTC imaging in tissues with extremely fast signal decay such as tendons. The aim of this study was to develop a technique for the quantification of the MT effect in healthy Achilles tendons in-vivo at 3 Tesla. MATERIALS AND METHODS 16 normal tendons of volunteers with no history of tendinopathy were examined using a 3D-UTE sequence with a rectangular on-resonant excitation pulse and a Fermi-shaped off-resonant MT preparation pulse. The frequency of the MT pulse was varied from 1 to 5 kHz. MT effects were calculated in terms of the MT ratio (MTR) between measurements without and with MT preparation. Direct saturation effects of MT preparation on the signal intensity were evaluated using numerical simulation of Bloch equations. One patient with tendinopathy was examined to exemplarily show changes of MTR under pathologic conditions. RESULTS Calculation of MTR data was feasible in all examined tendons and showed a decrease from 0.53 ± 0.05 to 0.25 ± 0.03 (1 kHz to 5 kHz) for healthy volunteers. Evaluation of variation with gender and dominance of ankle revealed no significant differences (p > 0.05). In contrast, the patient with confirmed tendinopathy showed MTR values between 0.36 (1 kHz) and 0.19 (5 kHz). CONCLUSION MT effects in human Achilles tendons can be reliably assessed in-vivo using a 3D UTE sequence at 3 T. All healthy tendons showed similar MTR values (coefficient of variation 10.0 ± 1.2 %). The examined patient showed a clearly different MT effect revealing a changed microstructure in the case of tendinopathy.
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Quantifizierung der longitudinalen Relaxationszeit in Geweben mit extrem schnellem Signalzerfall mithilfe einer Ultrashort-Echo-Time-(UTE)-Sequenz und optimierten Flipwinkeln. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Funktionelle MRT von Transplantatnieren mittels Diffusionswichtung (DWI) und Arterial Spin Labeling (ASL) Perfusionsbildgebung. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Evaluation of Magnetization Transfer Contrast Imaging in Human Achilles tendon using a 3D Ultrashort Echo Time Sequence at 3 Tesla. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1268264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Positiver Kontrast von Sehnen, Bändern und kortikalem Knochen: Neue Möglichkeiten der MR-Tomographie in der bildgebende Diagnostik des muskulo-skelettalen Systems. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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3D cine MR-Bildgebung zur Quantifizierung der Ventrikelfunktion bei Kleinkindern unter freier Atmung. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0029-1247983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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MR-tomographische Beurteilung von Nierenmorphologie, -Gefäßstatus sowie -Funktion bei potenziellen Nierenlebendspendern. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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MRT-Monitoring des HCC unter Antiangiogenesetherapie – eine Pilotstudie. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Diffusionsgewichtete MRT-Bildgebung im klinischen follow-up nach Leber-RFA. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Vergleich zwischen CT und MRT bei Cystischer Fibrose unter Berücksichtigung des nicht modifizierten Helbich(Bhalla)-Scores. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Magnetisierungstransfer von kortikalem Knochen: Neue Möglichkeiten der in-vivo MR-Bildgebung mittels ultrakurzer Echozeiten bei 3 Tesla. ROFO-FORTSCHR RONTG 2009. [DOI: 10.1055/s-0029-1221473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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