Diffusion-Weighted MR Imaging in Head and Neck Cancer: Comparison between Half-Fourier Acquired Single-Shot Turbo Spin-Echo and EPI Techniques

Verhappen, M.H.; Pouwels, Petra J. W.; Ljumanović, Redina; Putten, L. van der; Knol, Dirk L.; Bree, Remco de; Castelijns, Jonas A.

doi:10.3174/ajnr.a2949

Cited by 52 publications

(46 citation statements)

References 17 publications

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“…TSE-DWI-2b was the least reproducible sequence. These different findings may be attributed to the included subjects: healthy volunteers in the current study and patients with head and neck malignancies, which had diffusion restrictions in the study by Verhappen et al 8 TSE-DWI-2b has inherently lower SNR, 23 which limits the reproducibility in healthy tissue, whereas it does not have geometric distortion and is apparently sensitive enough to detect diffusion restriction. In the current study, ROIs were drawn on bϭ0 s/mm 2 images in visual correlation with anatomic T2 images.…”

Section: Discussionmentioning

confidence: 49%

“…In that case, geometric distortion of EPI techniques may reduce reproducibility among observers. 8 There is also a difference in reproducibility among various tissues in the head and neck area. On all MR imaging systems and sequences, ADC values of the submandibular gland were the least precise (Table 4).…”

Section: Discussionmentioning

confidence: 99%

“…In a study by Vandecaveye et al, 20 57% of malignant lymph nodes had a diameter of Ͻ1 cm; therefore, appropriate evaluation of small (apparently benign) structures is vital. Verhappen et al 8 drew ROIs on ADC maps of malignant tissue that showed diffusion restriction. Especially, DWI of primary tumors in the head and neck area may have geometric distortion due to the tumor location at the air-tissue interface.…”

Section: Discussionmentioning

confidence: 99%

“…However, the interobserver agreement of ADC values is reported to be higher on TSE-DWI, probably due to the frequent occurrence of artifacts and geometric distortions in EPI-DWI. 8 Currently the use of DWI in head and neck imaging is mostly confined to research protocols and advanced academic centers.…”

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confidence: 99%

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Diffusion-Weighted Imaging of the Head and Neck in Healthy Subjects: Reproducibility of ADC Values in Different MRI Systems and Repeat Sessions

Kolff-Gart¹,

Pouwels²,

Noij³

et al. 2014

AJNR Am J Neuroradiol

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Section: Discussionmentioning

confidence: 49%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Diffusion-Weighted Imaging of the Head and Neck in Healthy Subjects: Reproducibility of ADC Values in Different MRI Systems and Repeat Sessions

Kolff-Gart¹,

Pouwels²,

Noij³

et al. 2014

AJNR Am J Neuroradiol

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“…[10][11][12] In head-andneck cancer, DW-TSE has previously been reported [13][14][15][16][17] to detect and characterize lesions. The majority of the papers applying DW-TSE, report limited experimental details and the image quality is often sub-optimal.…”

Section: Introductionmentioning

confidence: 99%

Technical Note: Diffusion‐weighted MRI with minimal distortion in head‐and‐neck radiotherapy using a turbo spin echo acquisition method

et al. 2017

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Purpose: Diffusion-weighted (DW) MRI, showing high contrast between tumor and background tissue, is a promising technique in radiotherapy for tumor delineation. However, its use for head-and-neck patients is hampered by poor geometric accuracy in conventional echo planar imaging (EPI) DW-MRI. An alternative turbo spin echo sequence, DW-SPLICE, is implemented and demonstrated in patients. Methods: The DW-SPLICE sequence was implemented on a 3.0 T system and evaluated in 10 patients. The patients were scanned in treatment position, using a customized head support and immobilization mask. Image distortions were quantified at the gross tumor volume (GTV) using field map analysis. The apparent diffusion coefficient (ADC) was evaluated using an ice water phantom. Results: The DW images acquired by DW-SPLICE showed no image distortions. Field map analysis at the gross tumor volumes resulted in a median distortion of 0.2 mm for DW-SPLICE, whereas for the conventional method this was 7.2 mm. ADC values, measured using an ice water phantom were in accordance with literature values. Conclusions: The implementation of DW-SPLICE allows for diffusion-weighted imaging of patients in treatment position with excellent geometrical accuracy. The images can be used to facilitate target volume delineation in RT treatment planning.

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Sinonasal lymphoma: A primer for otolaryngologists

Bitner

Htun

Wang

et al. 2022

Laryngoscope Investig Oto

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Objective: Sinonasal lymphomas are a rare entity that commonly present with nonspecific sinonasal symptoms and are often recognized immediately. Through this review, we aim to summarize important principles in diagnosis and treatment of sinonasal lymphomas, with the goal of disseminating the current knowledge of this under-recognized malignancy to otolaryngologists.Methods: Systemic review using PRISMA guidelines of foundational scholarly articles, guidelines, and trials were reviewed focusing on clinical characteristics of key sinonasal lymphoma subtypes, along with available treatments in the otolaryngology, medical oncology, and radiation oncology literature.Results: Sinonasal lymphoma are derived from clonal proliferation of lymphocytes at various stages of differentiation, of which diffuse large B-cell lymphoma (DLBCL) and extranodal natural killer/T-cell lymphoma (ENKTL) are the most common. Diagnosis and staging require biopsy with immunohistochemistry in conjunction with imaging and laboratory studies. Treatment is ever evolving and currently includes multi-agent chemotherapy and/or radiation therapy. Conclusion:Otolaryngologists may be the first to recognize sinonasal lymphoma, which requires a comprehensive workup and a multidisciplinary team for treatment.Symptoms are nonspecific and similar to many sinonasal pathologies, and it is crucial for otolaryngologists to keep a broad differential.

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Diffusion-Weighted MR Imaging in Head and Neck Cancer: Comparison between Half-Fourier Acquired Single-Shot Turbo Spin-Echo and EPI Techniques

Cited by 52 publications

References 17 publications

Diffusion-Weighted Imaging of the Head and Neck in Healthy Subjects: Reproducibility of ADC Values in Different MRI Systems and Repeat Sessions

Diffusion-Weighted Imaging of the Head and Neck in Healthy Subjects: Reproducibility of ADC Values in Different MRI Systems and Repeat Sessions

Technical Note: Diffusion‐weighted MRI with minimal distortion in head‐and‐neck radiotherapy using a turbo spin echo acquisition method

Sinonasal lymphoma: A primer for otolaryngologists

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