scholarly journals Identifying Patients Who Will Most Benefit from Single Photon Emission Computerized Tomography and Computerized Tomography After Femoral Neck Fracture

2017 ◽  
Vol 23 ◽  
pp. 5669-5674
Author(s):  
Wenshuai Fan ◽  
Liang Zhu ◽  
Jifei Chen ◽  
Changan Guo ◽  
Zuoqin Yan
Keyword(s):  
Femoral Neck ◽  
Femoral Neck Fracture ◽  
Computerized Tomography ◽  
Single Photon ◽  
Photon Emission ◽  
Single Photon Emission ◽  
Neck Fracture

scholarly journals Prediction Value of SPECT/CT in Avascular Necrosis of Femoral Head After Femur Neck Fracture

2019 ◽  
Vol 10 ◽  
pp. 215145931987294
Author(s):  
Sung Jun Park ◽  
Bong Seong Ko ◽  
Kyoung Ho Moon ◽  
Minkyung Lee
Keyword(s):  
Computed Tomography ◽  
Femoral Head ◽  
Femoral Neck ◽  
Femoral Neck Fracture ◽  
Single Photon ◽  
Photon Emission ◽  
Diagnostic Value ◽  
Emission Computed Tomography ◽  
Neck Fracture ◽  
Photon Emission Computed Tomography

Introduction: The aim of this study was to determine the diagnostic value of single-photon emission computed tomography/computed tomography (SPECT/CT) in prediction of avascular necrosis (AVN) after femoral neck fracture and to evaluate whether photon defect in femoral head as seen in SPECT/CT can be an index for choice of surgical method. Methods: This study was based on 97 patients who took SPECT/CT after femoral neck fracture from November 2012 to November 2017, with 64 patients with femoral intertrochanteric fracture in which chances of AVN is rare as a comparison group. Among 97 patients with femoral neck fracture, osteosynthesis was conducted in 7 patients with less than 15% of photon defect in damaged femoral head and 7 patients who wanted osteosynthesis, despite photon defect more than 15%, and 83 patients with photon defect more than 25% had arthroplasty. Patient with osteosynthesis was followed up with AVN by conducting magnetic resonance imaging (MRI) in 1 year after the surgery. Results: Quantitative analysis of SPECT/CT in 14 patients who had femoral neck osteosynthesis showed that 7 patients with femoral neck fracture showed photon defect of 15% or more, but less than 25% and 3 patients in these were diagnosed with AVN after 1-year follow-up by MRI. Sensitivity and specificity of SPECT/CT in predicting AVN was 100% and 63.6%, respectively, with prediction accuracy of 71.4%. Among 14 patients with femoral neck fracture who had osteosynthesis, photon defect in 3 patients diagnosed with AVN was 19.6% ± 5.2%, but photon defect in 11 patients who was not diagnosed with AVN was 10.7% ± 5.2%, showing statistically significant difference between 2 groups ( P = .001). Conclusion: Single-photon emission computed tomography/CT in patients with femoral neck fracture is considered to have diagnostic value in predicting occurrence of AVN, and percentage of photon defect is considered to be an useful index in determining the operative method.

Diagnostic value of 201Tl—single-photon emission computerized tomography studies in cases of posterior fossa hemangioblastomas

2001 ◽  
Vol 95 (2) ◽  
pp. 292-297 ◽  
Author(s):  
Takeo Kondo ◽  
Toshihiro Kumabe ◽  
Shin Maruoka ◽  
Takashi Yoshimoto
Keyword(s):  
Computerized Tomography ◽  
Posterior Fossa ◽  
Single Photon ◽  
Photon Emission ◽  
Magnetic Resonance Images ◽  
Thallium 201 ◽  
Homologous Region ◽  
Single Photon Emission ◽  
Content Type ◽  
Fine Print

Object. The 201Tl uptake index was evaluated for its usefulness in formulating a diagnosis of hemangioblastoma. Thallium-201—single-photon emission computerized tomography (SPECT) studies were performed in nine patients harboring hemangioblastomas in the posterior fossa and in five patients (six lesions) with gliomas in the posterior fossa. Methods. The 201Tl uptake index was defined as the ratio of mean counts of isotope per pixel in the tumor to mean counts of isotope per pixel in the homologous region of the healthy brain. The 201Tl uptake indices of the early image (TlE) and that of the delayed image (TlD) were calculated. The isotope retention index (RI) was calculated as (TlE − TlD)/TlE. The TlE was 2.7 ± 0.7 in hemangioblastomas and 2.9 ± 1.7 in gliomas (mean ± standard deviation). The TlD was 1.5 ± 0.4 in hemangioblastomas and 2.4 ± 1.6 in gliomas. There were no significant differences between hemangioblastomas and gliomas when TlEs and TlDs were compared. The isotope RI was 0.43 ± 0.07 in hemangioblastomas and 0.15 ± 0.1 in gliomas, showing a significantly higher RI in hemangioblastomas compared with gliomas (p < 0.01). Conclusions. Thallium-201 washout is significantly faster in hemangioblastomas. Hemangioblastoma is biologically benign, but contains a rich capillary network that forms a hypervascular tumor bed. Variations in its appearance on magnetic resonance images may cause difficulties in the differential diagnosis of hemangioblastoma. Thallium-201 SPECT studies can be used to distinguish hemangioblastomas from gliomas in the posterior fossa.

In Vivo Quantitative Noninvasive Imaging of Gene Transfer by Single-Photon Emission Computerized Tomography

2003 ◽  
Vol 14 (3) ◽  
pp. 255-261 ◽  
Author(s):  
Alberto Auricchio ◽  
Paul D. Acton ◽  
Markus Hildinger ◽  
Jean-Pierre Louboutin ◽  
Karl Plössl ◽  
...  
Keyword(s):  
Gene Transfer ◽  
Computerized Tomography ◽  
Single Photon ◽  
Noninvasive Imaging ◽  
Photon Emission ◽  
Single Photon Emission

scholarly journals Cerebellar Diaschisis in Pontine Ischemia. A Case Report with Single-Photon Emission Computerized Tomography

1987 ◽  
Vol 7 (1) ◽  
pp. 127-131 ◽  
Author(s):  
D. Perani ◽  
G. Lucignani ◽  
P. Pantano ◽  
P. Gerundini ◽  
G. L. Lenzi ◽  
...  
Keyword(s):  
Case Report ◽  
Computerized Tomography ◽  
Acute Phase ◽  
Single Photon ◽  
Photon Emission ◽  
Single Photon Emission ◽  
Ischemic Lesion ◽  
Blood Flows ◽  
Cerebellar Diaschisis ◽  
Tomography Scan

Regional cerebral and cerebellar blood flows were studied by N, N, N'-trimethyl- N'-(2-hydroxy-3-methyl-5-[123I]iodobenzyl)-1,3-propanediamine 2 HC1 (1-123 HIPDM) and single-photon emission computerized tomography (SPECT) in a patient with an ischemic lesion of the pons. An asymmetry of perfusion of the cerebellar hemispheres, normal on transmission computerized tomography scan, was demonstrated by SPECT studies in the early acute phase and confirmed 15 days after. This finding may be related to the interruption of the corticopontocerebellar pathways.

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