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Featured researches published by Fritzgerald Leveque.


The Journal of Nuclear Medicine | 2017

Alternative Means of Estimating 131I Maximum Permissible Activity to Treat Thyroid Cancer

Kenneth Nichols; William Robeson; Miyuki Yoshida-Hay; Pat Zanzonico; Fritzgerald Leveque; Kuldeep K. Bhargava; Gene Tronco; Christopher J. Palestro

To protect bone marrow from overirradiation, the maximum permissible activity (MPA) of 131I to treat thyroid cancer is that which limits the absorbed dose to blood (as a surrogate of marrow) to less than 200 cGy. The conventional approach (method 1) requires repeated γ-camera whole-body measurements along with blood samples. We sought to determine whether reliable MPA values can be obtained by simplified procedures. Methods: Data acquired over multiple time points were examined retrospectively for 65 thyroid cancer patients, referred to determine 131I uptake and MPA for initial treatment after thyroidectomy (n = 39), including 17 patients with compromised renal function and 22 patients with known (n = 16) or suspected (n = 6) metastases. The total absorbed dose to blood (DTotal) was the sum of mean whole-body γ-ray dose component (Dγ) from uncollimated γ-camera measurements and dose due to β emissions (Dβ) from blood samples. Method 2 estimated DTotal from Dβ alone, method 3 estimated DTotal from Dγ alone, and method 4 estimated DTotal from a single 48-h γ-camera measurement. MPA was computed as 200 cGy/DTotal for each DTotal estimate. Results: Method 2 had the strongest correlation with conventional method 1 (r = 0.98) and values similar to method 1 (21.0 ± 13.7 cGy/GBq vs. 21.0 ± 14.1 cGy/GBq, P = 0.11), whereas method 3 had a weaker (P = 0.001) correlation (r = 0.94) and method 4 had the weakest (P < 0.0001) correlation (r = 0.69) and lower dose (16.3 ± 14.8 cGy/GBq, P < 0.0001). Consequently, correlation with method 1 MPA was strongest for method 2 MPA (r = 0.99) and weakest for method 4 (r = 0. 75). Method 2 and method 1 values agreed equally well regardless of whether patients had been treated with 131I previously or had abnormal renal function. Conclusion: Because MPA based on blood measurements alone is comparable to MPA obtained with combined body counting and blood sampling, blood measurements alone are sufficient for determining MPA.


The Journal of Nuclear Medicine | 2018

Influence of anti-anxiety medication on gastric emptying studies

Fritzgerald Leveque; Jeanine Drury; Xiyao Zhao; Maria-Bernadette Tomas; Christopher J. Palestro; Kenneth Nichols


The Journal of Nuclear Medicine | 2015

Molecular imaging identifies inflammatory cytokine-mediated alterations in renal tubular excretion in vivo

Kuldeep K. Bhargava; Kenneth Nichols; Fritzgerald Leveque; Sanjeev Gupta; Christopher J. Palestro


The Journal of Nuclear Medicine | 2015

Effect of collimator choice on 111In liquid gastric measurements

Peter Kamvosoulis; Fritzgerald Leveque; Maria-Bernadette Tomas; Kenneth Nichols; Christopher J. Palestro


Society of Nuclear Medicine Annual Meeting Abstracts | 2014

SPECT/CT for estimating hepatopulmonary shunting in selective internal radiotherapy: A phantom study

Alex Zaharakis; Fritzgerald Leveque; Jacek Backiel; Grace Tursi; Christopher Palestro; Kenneth Nichols


Society of Nuclear Medicine Annual Meeting Abstracts | 2014

Comparison of 123I-MIBG SPECT with low energy high resolution versus medium energy collimators

Kenneth Nichols; Maria-Bernadette Tomas; Fritzgerald Leveque; Christopher Palestro


The Journal of Nuclear Medicine | 2013

Relationship between cell concentration and image quality of 111In-labeled leukocyte scans

Fritzgerald Leveque; Kuldeep K. Bhargava; Paul Pugliese; Kenneth Nichols; Christopher J. Palestro


Society of Nuclear Medicine Annual Meeting Abstracts | 2013

Effects of reconstruction methods on quantitative analysis of 123I-FP-CIT dopamine transporter (DaT) SPECT scans by software

Kenneth Nichols; Maria-Bernadette Tomas; Fritzgerald Leveque; Christopher Palestro


The Journal of Nuclear Medicine | 2012

Quantitative image characteristics of presynaptic dopamine transporter (DAT) scans

Fritzgerald Leveque; Paul Pugliese; Maria B. Tomas; Jaimie Kim; Kenneth Nichols; Christopher J. Palestro


Society of Nuclear Medicine Annual Meeting Abstracts | 2012

Optimizing 123I-FP-CIT presynaptic dopamine transporter (DAT) SPECT reconstruction by phantom simulations

Kenneth Nichols; Maria Tomas; Leonardo Rivera; Fritzgerald Leveque; Christopher Palestro

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Kenneth Nichols

North Shore-LIJ Health System

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Christopher Palestro

Albert Einstein College of Medicine

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Paul Pugliese

North Shore-LIJ Health System

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Kuldeep K. Bhargava

North Shore-LIJ Health System

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Gene Tronco

North Shore-LIJ Health System

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Jaimie Kim

North Shore-LIJ Health System

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Maria B. Tomas

North Shore-LIJ Health System

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Maria Tomas

Long Island Jewish Medical Center

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