Fast T1- and T2-weighted pulmonary MR-imaging in patients with bronchial carcinoma

Both, Marcus; Schultze, Jürgen; Reuter, M.; Bewig, Burkhard; Hübner, Ralf-Harto; Bobis, I.; Noth, Rainer; Heller, Martin; Biederer, Jürgen

doi:10.1016/j.ejrad.2004.05.007

Cited by 53 publications

(33 citation statements)

References 24 publications

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“…although several studies have presented MRI assessment of pulmonary lesions as a similarly efficient modality (5)(6)(7)(8)(9). PMF is defined as a lesion of fibrosis and pigment deposition larger than 1 cm in diameter and is sometimes designated as "complicated" pneumoconiosis.…”

Section: Discussionmentioning

confidence: 99%

“…MRI of the lung is difficult and hampered by three factors: first (and very important) is signal loss due to physiological motion (respiration and cardiac pulsation); second is low proton density in lung results in a low signal-to-noise-ratio (SNR); and third is the unique combination of air and soft tissue resulting in significant susceptibility to artifact. Despite these difficulties, fast MRI techniques for evaluating lung pathology have been developed and addressed in a number of articles describing preliminary results (4)(5)(6). However, correct evaluation of PMF lesions by fast MRI techniques has not yet been well described.…”

mentioning

confidence: 99%

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Fast magnetic resonance imaging evaluating of pulmonary progressive massive fibrosis with vibe and HASTE sequences: comparison with computed tomography imaging

Hekimoğlu

Sancak²,

Tor³

et al. 2009

Diagn Interv Radiol

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Progressive massive fibrosis (PMF) of the lung is a type of late stage pneumoconiosis and pathologically consists of fibrotic lesions more than 1 cm in greatest diameter (1). The chest radiographic and computed tomography (CT) findings of PMF have been reported (2, 3). In our geographic region, PMF is mostly seen as a complication of coal workers' pneumoconiosis (CWP). Evaluation and follow-up of PMF lesions are generally performed by using CT scans in CWP patients. However, imaging has to provide detailed information about the anatomical extension of the PMF. Since CT imaging requires ionizing radiation and application of CT contrast agents is limited in patients with allergies to ionized contrast media or in patients with renal insufficiency, alternative imaging methods for diagnosis and follow-up are always of interest. If the fast magnetic resonance imaging (MRI) of PMF lesions of the lungs is proven to be diagnostically significant, this modality can be used instead of CT imaging. The rapid development of MRI techniques during the last years has resulted in excellent soft tissue imaging capabilities. MRI of the lung is difficult and hampered by three factors: first (and very important) is signal loss due to physiological motion (respiration and cardiac pulsation); second is low proton density in lung results in a low signal-to-noise-ratio (SNR); and third is the unique combination of air and soft tissue resulting in significant susceptibility to artifact. Despite these difficulties, fast MRI techniques for evaluating lung pathology have been developed and addressed in a number of articles describing preliminary results (4-6). However, correct evaluation of PMF lesions by fast MRI techniques has not yet been well described. Volumetric interpolated breath-hold examination (VIBE) and half-Fourier single-shot turbo spin echo (HASTE) MR sequences are very fast imaging techniques, and these techniques can also be used for fast pulmonary imaging.In the present study, we hypothesized that fast pulmonary MRI of the PMF lesions by using VIBE and HASTE fast MRI protocols would enable detection of lesions and might have a role in the management of PMF, especially in long-term follow-up. Thus, the purpose of our study was to determine the feasibility of fast MRI in the management of PMF in comparison with CT imaging. Materials and methods Study designTwenty-three patients were enrolled in this prospective study between January 2007 and July 2008. Three patients were unable to undergo MRI because of claustrophobia and had to be excluded from the study. Thus, data sets of 20 patients were analyzed for this study. All patients were male, with an age range of 52-82 years (mean, 72 years). The patients had worked as coal miners for 15-25 years (mean, 15 years) working underground. They had pulmonary mass lesions rang- CHEST IMAGING PURPOSEThe aim of this prospective study was to evaluate the diagnostic utility of volumetric interpolated breath-hold examination (VIBE) and half-Fourier-acquisition single-shot turbo spin-echo ...

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Fast magnetic resonance imaging evaluating of pulmonary progressive massive fibrosis with vibe and HASTE sequences: comparison with computed tomography imaging

Hekimoğlu

Sancak²,

Tor³

et al. 2009

Diagn Interv Radiol

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“…These findings might not be generalized for other pulse sequences used for pulmonary MRI (e.g., 3D GRE or TSE MRI). However, HASTE is generally accepted as a standard imaging technique for lung imaging and has been clinically evaluated for the assessment of lung pathology such as pulmonary nodules and infiltrates (3,6,7,9,12,13,24). Our study has several potential limitations.…”

Section: Discussionmentioning

confidence: 92%

Half‐fourier‐acquisition single‐shot turbo spin‐echo (HASTE) MRI of the lung at 3 Tesla using parallel imaging with 32‐receiver channel technology

Henzler

Dietrich

Krissak

et al. 2009

Magnetic Resonance Imaging

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Purpose:To assess the feasibility of half-Fourier-acquisition single-shot turbo spin-echo (HASTE) of the lung at 3 Tesla (T) using parallel imaging with a prototype of a 32-channel torso array coil, and to determine the optimum acceleration factor for the delineation of intrapulmonary anatomy. Materials and Methods:Nine volunteers were examined on a 32-channel 3T MRI system using a prototype 32-channeltorso-array-coil. HASTE-MRI of the lung was acquired at both, end-inspiratory and end-expiratory breathhold with parallel imaging (Generalized autocalibrating partially parallel acquisitions ϭ GRAPPA) using acceleration factors ranging between R ϭ 1 (TE ϭ 42 ms) and R ϭ 6 (TE ϭ 16 ms). The image quality of intrapulmonary anatomy and subjectively perceived noise level was analyzed by two radiologists in consensus. In addition quantitative measurements of the signalto-noise ratio (SNR) of HASTE with different acceleration factors were assessed in phantom measurements. Results:Using an acceleration factor of R ϭ 4 image blurring was substantially reduced compared with lower acceleration factors resulting in sharp delineation of intrapulmonary structures in expiratory scans. For inspiratory scans an acceleration factor of 2 provided the best image quality. Expiratory scans had a higher subjectively perceived SNR than inspiratory scans. Conclusion:Using optimized multi-element coil geometry HASTE-MRI of the lung is feasible at 3T with acceleration factors up to 4. Compared with nonaccelerated acquisitions, shorter echo times and reduced image blurring are achieved. Expiratory scanning may be favorable to compensate for susceptibility associated signal loss at 3T.

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“…These sequences provided a good depiction of anatomical structures. Some reports describe thoracic diseases using the same sequences (1,25). However, in live animals the technical changes including use of closed-bore 1.5 T high-field configuration, a cardio-respiratory gating, and different sequences produce high-quality diagnostic images without artefacts (4,13).…”

Section: Discussionmentioning

confidence: 99%

“…This anatomical study can aid in the diagnosis of different thoracic disorders such as malformations (17), pericardial diseases (1), thoracic wall injuries (11), inflammation (26), infection (27), and masses (25). In the future, it would be interesting to perform further studies with low and higher magnetic fields on live animals, along with the administration of a contrast medium to establish a protocol for magnetic resonance angiography.…”

Section: Discussionmentioning

confidence: 99%

Low-field magnetic resonance anatomic features of the neonatalfoal thorax: an ex vivo study

Arencibia¹,

Sandoval²,

Gil³

et al. 2015

Turk J Vet Anim Sci

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The purpose of this study was to describe the normal appearance of the bony and soft tissue structures of the thorax of neonatal foals by low-field magnetic resonance imaging (MRI) and the use of anatomical dissections and gross sections. Three purebred Spanish neonatal foals that died for medical reasons unrelated to thoracic disease were used to obtain T1-and T2-weighted MR images using a magnet of 0.2 Tesla. Anatomic structures on the MR images were evaluated according to characteristics of signal intensity of the different organic tissues. The bones, different associated muscles, diaphragm, trachea, main bronchi, lungs, esophagus, heart chambers, and associated great vessels were well-visualized and evaluated with a low magnetic field. MRI provided correct discrimination of thoracic structures, and this information could be used as an initial anatomic reference for the interpretation of MR images of the thoraxes of neonatal foals.

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Fast T1- and T2-weighted pulmonary MR-imaging in patients with bronchial carcinoma

Cited by 53 publications

References 24 publications

Fast magnetic resonance imaging evaluating of pulmonary progressive massive fibrosis with vibe and HASTE sequences: comparison with computed tomography imaging

Fast magnetic resonance imaging evaluating of pulmonary progressive massive fibrosis with vibe and HASTE sequences: comparison with computed tomography imaging

Half‐fourier‐acquisition single‐shot turbo spin‐echo (HASTE) MRI of the lung at 3 Tesla using parallel imaging with 32‐receiver channel technology

Low-field magnetic resonance anatomic features of the neonatalfoal thorax: an ex vivo study

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