Gd3+/Yb3+-Doped Zinc Oxide Quantum Dots for Dual Modal Magnetic Resonance Imaging/Computed Tomographic Imaging

Abstract OBJECTIVE Although a few studies have quantified errors in the implantation of deep brain stimulation electrodes into the subthalamic nucleus (STN), a significant trend in error direction has not been reported. We have previously found that an error in axial plane, which is of most concern because it cannot be compensated for during deep brain stimulation programming, had a posteromedial trend. We hypothesized that this trend results from a predominance of a directionally oriented error factor of brain origin. Accordingly, elimination of nonbrain (technical) error factors could augment this trend. Thus, implantation accuracy could be improved by anterolateral compensation during target planning. METHODS Surgical technique was revised to minimize technical error factors. During 22 implantations, targets were selected on axial magnetic resonance imaging scans up to 1.5 mm anterolateral from the STN center. Using fusion of postoperative computed tomographic and preoperative magnetic resonance imaging scans, implantation errors in the axial plane were obtained and compared with distances from the lead to the STN to evaluate the benefit of anterolateral compensation. RESULTS Twenty errors and the mean error had a posteromedial direction. The average distances from the lead to the target and to the STN were 1.7 mm (range, 0.8–3.1 mm) and 1.1 mm (range, 0.1–1.9 mm), respectively. The difference between the 2 distances was significant (paired t test, P < 0.0001). The lower parts of the lead were consistently bent in the posteromedial direction on postoperative scout computed tomographic scans, suggesting that a brain-related factor is responsible for the reported error. CONCLUSION Elimination of the technical factors of error during STN deep brain stimulation implantation can result in a consistent posteromedial error. Implantation accuracy may be improved by compensation for this error in advance.

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Primary Intrasellar Microgerminoma Detected by Magnetic Resonance Imaging: Case Report

Neurosurgery ◽

10.1227/00006123-198909000-00024 ◽

1989 ◽

Vol 25 (3) ◽

pp. 458-462 ◽

Cited By ~ 16

Author(s):

Mariko Oishi ◽

Takaharu Iida ◽

Misako Koide ◽

Yoshiharu Akazawa ◽

Yoshie Azuma ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Hormone Secretion ◽

Growth Hormone Secretion ◽

Sella Turcica ◽

Posterior Lobe ◽

Resonance Imaging ◽

Pituitary Fossa ◽

Computed Tomographic ◽

Initial Symptoms

Abstract A case of primary intrasellar germinoma in a 24-year-old woman is presented. Her initial symptoms were diabetes insipidus and headaches. The neurological examination found no abnormalities, but the endocrinological examination disclosed a deficiency in growth hormone secretion. Her skull x-ray revealed a normal sella turcica, and a computed tomographic scan revealed no abnormal mass in the pituitary fossa, but a slightly enlarged stalk. Magnetic resonance imaging revealed a small tumor in the posterior lobe. Transsphenoidal exploration revealed a germinoma in the posterior pituitary lobe. Six cases of primary intrasellar germinoma, including our case, were reviewed. Our case is considered to be the smallest intrasellar germinoma yet reported.

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Ultrasonographic, computed tomographic and magnetic resonance imaging anatomy of the normal canine stifle joint

The Veterinary Journal ◽

10.1016/j.tvjl.2006.08.019 ◽

2007 ◽

Vol 174 (2) ◽

pp. 351-361 ◽

Cited By ~ 23

Author(s):

Marta Soler ◽

José Murciano ◽

Rafael Latorre ◽

Eliseo Belda ◽

Maria J. Rodrı´guez ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Resonance Imaging ◽

Computed Tomographic ◽

Stifle Joint ◽

Canine Stifle

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Integrated magnetic resonance imaging and [ 11 C]‐PBR28 positron emission tomographic imaging in amyotrophic lateral sclerosis

Annals of Neurology ◽

10.1002/ana.25251 ◽

2018 ◽

Vol 83 (6) ◽

pp. 1186-1197 ◽

Cited By ~ 27

Author(s):

Mohamad J. Alshikho ◽

Nicole R. Zürcher ◽

Marco L. Loggia ◽

Paul Cernasov ◽

Beverly Reynolds ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Amyotrophic Lateral Sclerosis ◽

Magnetic Resonance ◽

Tomographic Imaging ◽

Positron Emission Tomographic ◽

Resonance Imaging ◽

Positron Emission ◽

Lateral Sclerosis

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Enriching Mn-Doped ZnSe Quantum Dots onto Mesoporous Silica Nanoparticles for Enhanced Fluorescence/Magnetic Resonance Imaging Dual-Modal Bio-Imaging

ACS Applied Materials & Interfaces ◽

10.1021/acsami.8b14554 ◽

2018 ◽

Vol 10 (40) ◽

pp. 34060-34067 ◽

Cited By ~ 24

Author(s):

Ronghui Zhou ◽

Shaokai Sun ◽

Chenghui Li ◽

Lan Wu ◽

Xiandeng Hou ◽

...

Keyword(s):

Magnetic Resonance Imaging ◽

Quantum Dots ◽

Magnetic Resonance ◽

Mesoporous Silica ◽

Silica Nanoparticles ◽

Mesoporous Silica Nanoparticles ◽

Resonance Imaging ◽

Enhanced Fluorescence ◽

Bio Imaging ◽

Mn Doped

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Case Study of a Rare Incidence of a Leiomyosarcoma Mass Occluding the Distal Femoral Vein

Journal of Diagnostic Medical Sonography ◽

10.1177/87564793211044075 ◽

2021 ◽

pp. 875647932110440

Author(s):

Tammy Perkins ◽

Kelly McDonald ◽

Douglas Clem

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Lower Extremity ◽

Femoral Artery ◽

Femoral Vein ◽

Lower Leg ◽

Resonance Imaging ◽

Computed Tomographic ◽

Magnetic Resonance Imaging Mri

This is a case study of a 47-year-old Caucasian male whose chief concern was left lower leg swelling for 1 month. A unilateral lower extremity venous duplex examination was performed. The results concluded that the distal femoral vein was occluded to the distal popliteal vein. Incidentally, a hypoechoic region in the distal thigh near the distal femoral artery was noted by the technologist. The patient was placed on anticoagulation and was told to return for further examination if there was no relief. Three months later, the patient continued to experience lower left leg swelling and returned for another sonogram. The hypoechoic region was seen again in the distal thigh and remained occluded. A computed tomographic arterial (CT-A) and magnetic resonance imaging (MRI) were ordered for further investigation of the hypoechoic area. The CT-A and the MRI revealed the presence of a mass in the distal thigh. The mass was biopsied and diagnosed as a leiomyosarcoma, grade 1. The mass caused the compression and occlusion of the distal femoral vein. The mass was removed, along with a portion of the distal femoral artery due to involvement of the artery within the mass. The artery was repaired with a graft.

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Magnetic Resonance Versus Computed Tomographic Imaging in Acute Stroke

Stroke ◽

10.1161/01.str.26.5.807 ◽

1995 ◽

Vol 26 (5) ◽

pp. 807-812 ◽

Cited By ~ 141

Author(s):

J. P. Mohr ◽

J. Biller ◽

S. K. Hilal ◽

W. T. C. Yuh ◽

T. K. Tatemichi ◽

...

Keyword(s):

Magnetic Resonance ◽

Acute Stroke ◽

Tomographic Imaging ◽

Computed Tomographic ◽

Computed Tomographic Imaging

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Psychogenic Unresponsiveness

Plum and Posner's Diagnosis and Treatment of Stupor and Coma ◽

10.1093/med/9780190208875.003.0006 ◽

2019 ◽

pp. 291-304

Author(s):

Jerome B. Posner ◽

Clifford B. Saper ◽

Nicholas D. Schiff ◽

Jan Claassen

Keyword(s):

Magnetic Resonance Imaging ◽

Magnetic Resonance ◽

Diagnostic Tests ◽

Epileptic Seizures ◽

Tomographic Imaging ◽

Factitious Disorder ◽

Cerebellar Mutism ◽

Conversion Reaction ◽

Computed Tomographic ◽

Psychogenic Seizures

Chapter 6 explores psychiatric causes of unresponsiveness, which must be differentiated from organic causes of stupor and coma. The chapter notes that several psychiatric disorders can result in psychogenic unresponsiveness. These include conversion reaction, catatonic stupor, a dissociative or “fugue” state, and factitious disorder or malingering. The chapter looks at these in turn. Various diagnostic tests are described in detail, including the electroencephalogram, magnetic resonance imaging, computed tomographic imaging, caloric testing, and the “Amytal interview.” Sections describes the diagnosis and treatment of catatonia, psychogenic seizures (which must be differentiated from epileptic seizures), and cerebellar mutism. The authors emphasize the importance of treating patients with psychiatric causes of unresponsiveness with compassion and understanding.

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