Brain Fiber Tracking with Clinically Feasible Diffusion-Tensor MR Imaging: Initial Experience

Yamada, Kazuo; Kizu, Osamu; Mori, Susumu; Ito, Hirotoshi; Nakamura, Hisao; Yuen, Sachiko; Kubota, Takao; Tanaka, Osamu; Akada, Wataru; Sasajima, Hiroyasu; Mineura, Katsuyoshi; Nishimura, Tsunehiko

doi:10.1148/radiol.2271020313

Cited by 126 publications

(70 citation statements)

References 26 publications

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“…DTI-based tractography is currently the only imaging method used to show white matter tracts in vivo (5,14). This technique is widely used to visualize motor, sensory, speech and visual pathways for neurosurgical planning and postoperative assessment (1,3).…”

Section: Discussionmentioning

confidence: 99%

“…The parallel-imaging technique allows image reconstruction with half encoding steps, the advantage of which lies in its reduction in the geometric image distortion that is unique to echo-planar imaging. A total of 36 slices with a thickness of 2 mm and without interslice gaps were obtained (5,10). The DTI studies were performed at the end of the routine work-up for the pre-surgical evaluation of brain tumors at our institute with an average acquisition time of 7 min.…”

Section: Methodsmentioning

confidence: 99%

“…However, these techniques provide limited information regarding the integrity and location of white matter tracts adjacent to the lesions. Similarly, functional MRI (fMRI) provides limited information on the status of white matter structures, although it localizes eloquent cortical areas surrounding brain lesions (2,3,5,6).…”

Section: Introductionmentioning

confidence: 99%

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Surgical strategy of brain tumors adjacent to the optic radiation using diffusion tensor imaging-based tractography

Tatsuzawa¹,

Owada²,

Sasajima³

et al. 2010

Oncology Letters

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Abstract. The present study evaluated the efficacy of diffusion tensor imaging (DTI)-based tractography in the surgery of brain tumors adjacent to the optic radiation. Of the 14 surgical cases included, 11 had metastatic brain tumors and 3 cerebral gliomas. Additionally, 4 of the 14 patients had pre-operative visual field defects, while the remaining 10 patients experienced no visual impairment. The optic radiations on the lesion side were evident in all 14 patients. On the basis of these tractographic findings, we employed optimal surgical approaches in each patient to avoid injury to the eloquent neural structures, including optic radiation, during surgery. Successful surgical resection was performed in all 14 patients. Of the 14 patients, 2 with visual field defects during the pre-operative period showed improvement in their visual field, and the remaining 12 patients experienced no visual deterioration. DTI-based tractography thus is a feasible modality for the surgical planning of brain lesions adjacent to the optic radiation.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Surgical strategy of brain tumors adjacent to the optic radiation using diffusion tensor imaging-based tractography

Tatsuzawa¹,

Owada²,

Sasajima³

et al. 2010

Oncology Letters

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“…Recently, some reports have demonstrated cases with reversible loss of anisotropy in the white matter. Kim et al 8 and Yamada et al 22 reported that a decreased FA value on DTI did not necessarily represent direct damage to the tract but was more commonly noted to be a result of vasogenic edema and tract compression by the mass effect. Then, they believed that reversible loss of FA in cases of CSDH is incurred by the distortion of the pyramidal tract and vasogenic edema due to expansion of the hematoma.…”

Section: Discussionmentioning

confidence: 99%

Diffusion Tensor Imaging in Chronic Subdural Hematoma: Correlation between Clinical Signs and Fractional Anisotropy in the Pyramidal Tract

Yokoyama

Matsuki²,

Shimano³

et al. 2008

AJNR Am J Neuroradiol

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“…Brain fiber tracking was performed by using software on a workstation (FuncTool; GE Healthcare). The sensory and pyramidal motor tracts were observed by the method introduced by Yamada et al 9 Fiber tractography demonstrated a markedly decreased fiber tract volume of the sensory and motor pyramidal tract on the right side. Sensory tract derangement was more prominent as compared with motor tract involvement (Fig 2).…”

mentioning

confidence: 99%

Diffusion Tensor Imaging and Fiber Tractography in Parry-Romberg Syndrome

Moon¹,

Kim²,

Roh³

et al. 2008

AJNR Am J Neuroradiol

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SUMMARY:We report a case of Parry-Romberg syndrome in a 32-year-old woman presenting with intermittent headache and mild sensory disturbance. MR imaging revealed minimal asymmetric atrophy of the right hemisphere with a few nonspecific white matter hyperintensities. Diffusion tensor imaging and fiber tractography, however, demonstrated clear fiber derangement, especially in the sensory tract of the right cerebral white matter. P arry-Romberg syndrome (PRS) is an acquired progressive facial hemiatrophy of the skin and subcutaneous tissue, and sometimes underlying bony structure, with an occasional involvement of the nervous system [1][2][3][4][5] The atrophic process commonly appears during the first and second decades of life and affects mainly the face below the forehead. 6 The most common neurologic manifestation is epilepsy; however, there are many other neurologic features, such as migraine, facial pain, and structural brain lesions. 1-8We report a case of a patient with PRS presenting with sensory disturbance and subtle white matter changes. We confirmed white matter involvement of PRS by the use of diffusion tensor imaging (DTI) and fiber tractography with 3T MR imaging. Case ReportA 32-year-old woman presented with intermittent headache, progressive left hemihypoesthesia (lower extremity), and right hemifacial paresthesia for 2 years. The patient recalled that the progressive facial asymmetry started 20 years previously. A physical examination revealed skull depression under the thin skin in the left frontal and right parieto-occipital region, bilateral facial hemiatrophy with alopecia, and bilateral enophthalmos, being more prominent on the left side. On a neurologic examination, the patient showed hyperactive deep tendon reflexes on both knee jerks with a left extensor plantar response, along with a peripheral facial palsy on the right side. Laboratory examinations such as blood counts, renal and hepatic function tests, hypercoagulability screening, and autoantibodies revealed normal findings.Conventional MR images as well as DTIs were obtained by using a 3T MR imaging scanner (Signa HDx; GE Healthcare, Milwaukee, Wis). T2-weighted images and fluid-attenuated inversion recovery (FLAIR) images showed a few tiny hyperintensities in the right frontoparietal periventricular white matter, right globus pallidus, left lateral thalamus, and right upper pons (Fig 1A, -B). Mild asymmetric atrophy of the right midbrain was noted. A 3D volume rendering image from the T1-weighted images depicted bilateral asymmetric scalp and calvarial atrophy (Fig 1C).DTI was performed by using a Stejskal-Tanner sequence with single-shot spin-echo-type echo-planar imaging (TR/TE, 10,000/82 ms; matrix size, 128 ϫ 128; FOV, 240 mm; 66 axial sections; 2.4-mm section thickness). We obtained diffusion-weighted images along 25 different directions with a b-value of 1000 s/mm 2 , as well as an image without diffusion weighting (b ϭ 0 s/mm 2 ). Brain fiber tracking was performed by using software on a workstation (FuncTool; GE Healthcare)....

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Brain Fiber Tracking with Clinically Feasible Diffusion-Tensor MR Imaging: Initial Experience

Cited by 126 publications

References 26 publications

Surgical strategy of brain tumors adjacent to the optic radiation using diffusion tensor imaging-based tractography

Surgical strategy of brain tumors adjacent to the optic radiation using diffusion tensor imaging-based tractography

Diffusion Tensor Imaging in Chronic Subdural Hematoma: Correlation between Clinical Signs and Fractional Anisotropy in the Pyramidal Tract

Diffusion Tensor Imaging and Fiber Tractography in Parry-Romberg Syndrome

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