Abstract:
PURPOSE:Non-invasive in vivo positron emission tomography (PET) provides high detection sensitivity in the nano- to picomolar range and in addition to other advantages, the possibility to absolutely quantify the acquired data. The present study focuses on the comparison of transmission data acquired with an X-ray computed tomography (CT) scanner or a Co-57 source for the Inveon small animal PET scanner (Siemens Healthcare, Knoxville, TN, USA), as well as determines their influences on the quantification accuracy and partial volume effect (PVE). A special focus included the impact of the performed calibration on the quantification accuracy. PROCEDURES:Phantom measurements were carried out to determine the quantification accuracy, the influence of the object size on the quantification, and the PVE for different sphere sizes, along the field of view and for different contrast ratios. RESULTS:An influence of the emission activity on the Co-57 transmission measurements was discovered (deviations up to 24.06 % measured to true activity), whereas no influence of the emission activity on the CT attenuation correction was identified (deviations <3 % for measured to true activity). The quantification accuracy was substantially influenced by the applied calibration factor and by the object size. The PVE demonstrated a dependency on the sphere size, the position within the field of view, the reconstruction and correction algorithms and the count statistics. Depending on the reconstruction algorithm, only ∼30-40 % of the true activity within a small sphere could be resolved. The iterative 3D reconstruction algorithms uncovered substantially increased recovery values compared to the analytical and 2D iterative reconstruction algorithms (up to 70.46 % and 80.82 % recovery for the smallest and largest sphere using iterative 3D reconstruction algorithms). The transmission measurement (CT or Co-57 source) to correct for attenuation did not severely influence the PVE. CONCLUSIONS:The analysis of the quantification accuracy and the PVE revealed an influence of the object size, the reconstruction algorithm and the applied corrections. Particularly, the influence of the emission activity during the transmission measurement performed with a Co-57 source must be considered. To receive comparable results, also among different scanner configurations, standardization of the acquisition (imaging parameters, as well as applied reconstruction and correction protocols) is necessary.
journal_name
Mol Imaging Bioljournal_title
Molecular imaging and biologyauthors
Mannheim JG,Schmid AM,Pichler BJdoi
10.1007/s11307-017-1074-xsubject
Has Abstractpub_date
2017-12-01 00:00:00pages
825-836issue
6eissn
1536-1632issn
1860-2002pii
10.1007/s11307-017-1074-xjournal_volume
19pub_type
杂志文章abstract:PURPOSE:Magnetic resonance imaging (MRI) with targeted contrast agents provides a promising means for diagnosis and treatment monitoring after cerebrovascular injury. Our goal was to demonstrate the feasibility of this approach to detect the neuroinflammatory biomarker intercellular adhesion molecule-1 (ICAM-1) after s...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-013-0617-z
更新日期:2013-08-01 00:00:00
abstract:PURPOSE:[123I]FP-CIT (DaTSCAN®) single-photon emission computed tomography (SPECT) imaging is widely used to study neurodegenerative parkinsonism, by measuring presynaptic dopamine transporter (DAT) in striatal regions. Beyond DAT, [123I]FP-CIT may be considered for other monoaminergic systems, in particular the seroto...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-017-1052-3
更新日期:2017-10-01 00:00:00
abstract:PURPOSE:Repetitive imaging with microPET of endogenous albumin gene expression by using transgenic mice in which the Herpes Simplex Virus Type 1 thymidine kinase (HSV1-tk) reporter gene is driven by the albumin promoter (AL-HSV1-tk). METHODS:Transgenic mice were imaged repeatedly on a microPET scanner with approximate...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1016/s1095-0397(01)00071-1
更新日期:2002-01-01 00:00:00
abstract:PURPOSE:To demonstrate the efficacy of repeated, non-invasive optical imaging of reporter gene expression in monitoring the ability of bi-specific recombinant molecules (i) to "transductionally untarget" adenovirus from Coxsackie and Adenovirus Receptor (CAR)-dependent infection of normal tissue and (ii) to "transducti...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1016/j.mibio.2004.09.002
更新日期:2004-11-01 00:00:00
abstract::We evaluated the clinical utility of 2-deoxy-2-[F-18]fluoro-D-glucose (FDG)-positron emission tomography (PET)/computed tomography (CT) on the precise localization of pathologic foci and exclusion of normal variants in the imaging evaluation of patients with esophageal carcinoma. Combined PET/CT scans were performed i...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-006-0036-5
更新日期:2006-05-01 00:00:00
abstract:PURPOSE:Visualization of tumor necrosis can determine tumor response to therapy. Our previous study showed that the rhein-based magnetic resonance imaging (MRI) contrast agent with alkane linker (GdL2) could clearly image tumor necrosis. However, its water solubility and cell safety needed to be improved. Herein, three...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-020-01551-3
更新日期:2020-10-13 00:00:00
abstract:PURPOSE:The development of theranostic nanocarriers as an innovative therapy against cancer has been improved by targeting properties in order to optimize the drug delivery to safely achieve its desired therapeutic effect. The aim of this paper is to evaluate the magnetic targeting (MT) efficiency of ultra-magnetic lip...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-018-1238-3
更新日期:2019-04-01 00:00:00
abstract:PURPOSE:Carbon ion radiotherapy (CIRT) has been developed, and a phase I/II CIRT trial has been conducted in patients with adenocarcinoma in the head and neck region. We evaluated whether the L-methyl [11C]-methionine (MET) uptake could be an early predictor for local recurrence, metastasis, and the prognosis in patien...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-010-0318-9
更新日期:2010-10-01 00:00:00
abstract::The cyclooxygenase-2 (COX-2) gene plays a role in a wide variety of normal physiologic pathways and is a major target of pharmacologic intervention in a large number of pathophysiologic contexts, including pain, fever, inflammation, and cancer. Expression of the COX-2 gene is induced in a wide range of cells, in respo...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1016/s1536-1632(03)00105-7
更新日期:2003-07-01 00:00:00
abstract::The Commercial Innovation of the Year Award went to Emile Beaulieu of Photon etc. for their work. ...
journal_title:Molecular imaging and biology
pub_type: 已发布勘误
doi:10.1007/s11307-019-01457-9
更新日期:2020-02-01 00:00:00
abstract::This article is about head and neck tumor MR imaging and is not within the scope of two National Institutes of Health grants (R0ICA166171, ROICA228188) erroneously listed. Thus, the authors would like to remove the reference to the NIH grants R01CA166171 and R01CA228188 in this article. ...
journal_title:Molecular imaging and biology
pub_type: 已发布勘误
doi:10.1007/s11307-019-01459-7
更新日期:2020-02-01 00:00:00
abstract:PURPOSE:Noninvasive imaging of cell necrosis can provide an early evaluation of tumor response to treatments. Here, we aimed to design and synthesize a novel diindole-based magnetic resonance imaging (MRI) contrast agent (Gd-bis-DOTA-diindolylmethane, Gd-DIM) for assessment of tumor response to therapy at an early stag...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-019-01399-2
更新日期:2020-06-01 00:00:00
abstract:PURPOSE:Preclinical dynamic brain PET studies remain hampered by the limitations related to the measurement of the arterial input function (AIF). In this regard, the use of an arterial-venous shunt is a promising method for the generation of real-time AIFs, but its application in longitudinal studies is still impeded b...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-020-01556-y
更新日期:2020-11-17 00:00:00
abstract:PURPOSE:The purpose of this study was to determine the most useful parameter of dual-time-point 2-deoxy-2-[¹⁸F]fluoro-D: -glucose positron emission tomography/computed tomography (PET/CT) for detection of hepatic metastases in patients with colorectal cancer. PROCEDURES:Thirty-nine patients had undergone a dual-time-p...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-010-0394-x
更新日期:2011-06-01 00:00:00
abstract::2'-deoxy-2'-[(18)F]fluoro-5-ethyl-1-beta-D-arabinofuranosyluracil ([(18)F]FEAU) is a promising radiolabeled nucleoside designed to monitor Herpes Simplex Virus Type 1 thymidine kinase (HSV1-tk) reporter gene expression with positron emission tomography (PET). However, the challenging radiosynthesis creates problems fo...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-007-0122-3
更新日期:2008-03-01 00:00:00
abstract:PURPOSE:To evaluate the utility of three-dimensional (3D) amide proton transfer-weighted (APTw) imaging for differentiation of endometrial adenocarcinoma and uterine benign lesions. PROCEDURES:This prospective study enrolled 22 normal volunteers and 113 patients with suspicious uterine lesions, including endometrial a...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-020-01565-x
更新日期:2020-11-13 00:00:00
abstract:PURPOSE:Synapse loss is a hallmark of Alzheimer's disease (AD) and correlates with cognitive decline. The validation of a noninvasive in vivo imaging approach to quantify synapse would greatly facilitate our understanding of AD pathogenesis and assist drug developments for AD. As animal models of neurodegenerative and ...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-020-01567-9
更新日期:2020-11-30 00:00:00
abstract:PURPOSE:To evaluate the clinical significance of differences in 2-deoxy-2-[18F]fluoro-D-glucose positron emission tomography (FDG-PET) lymph node standardized uptake values (SUV) in human immunodeficiency virus (HIV) infection using iterative reconstruction with segmented attenuation correction (IR SAC) compared to fil...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1016/s1536-1632(02)00014-8
更新日期:2002-07-01 00:00:00
abstract:PURPOSE:The sigma-2 (σ(2)) receptor is a potential biomarker of proliferative status of solid tumors. Specific synthetic probes using N-substituted-9-azabicyclo [3.3.1]nonan-3α-yl carbamate analogs have been designed and implemented for experimental cancer diagnosis and therapy. PROCEDURES:We employed the fluorescentl...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-011-0493-3
更新日期:2012-06-01 00:00:00
abstract:PURPOSE:Rats are important preclinical models for studying breast cancer metastasis and bone pathologies. In these research areas, fluorescence molecular tomography (FMT) is commonly applied for quantitative three-dimensional (3D) imaging in mice. However, uncertainties due to strong depth dependency of FMT signal and ...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-013-0698-8
更新日期:2014-06-01 00:00:00
abstract::This paper demonstrates the application of mutual information based coregistration of radionuclide and magnetic resonance imaging (MRI) in an effort to use multimodality imaging for noninvasive localization of stem cells grafted in the infarcted myocardium in rats. Radionuclide imaging such as single photon emission c...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-006-0062-3
更新日期:2007-01-01 00:00:00
abstract:PURPOSE:Negative surgical margins (NSMs) have favorable prognostic implications in breast tumor resection surgery. Fluorescence image-guided surgery (FIGS) has the ability to delineate surgical margins in real time, potentially improving the completeness of tumor resection. We have recently developed indocyanine green ...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-019-01462-y
更新日期:2020-08-01 00:00:00
abstract:PURPOSE:To determine the prevalence of viable myocardium in patients with ischemic cardiomyopathy and, to evaluate the value of three-dimensional (3-D) fusion imaging of myocardial scintigraphic and angiographic data to assign coronary artery lesions to the corresponding viable and nonviable myocardial territory. PROC...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1016/j.mibio.2004.02.002
更新日期:2004-05-01 00:00:00
abstract:PURPOSE:To provide reliable and reproducible heart/mediastinum (H/M) ratio cut-off values for parkinsonian disorders using two machine learning techniques, Support Vector Machines (SVM) and Random Forest (RF) classifier, applied to [123I]MIBG cardiac scintigraphy. PROCEDURES:We studied 85 subjects, 50 with idiopathic ...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-019-01406-6
更新日期:2020-06-01 00:00:00
abstract:PURPOSE:Conventional in vivo bioluminescence imaging using wild-type green-emitting luciferase is limited by absorption and scattering of the bioluminescent signal through tissues. Imaging methods using a red-shifted thermostable luciferase from Photinus pyralis were optimized to improve the sensitivity and image resol...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-009-0291-3
更新日期:2010-08-01 00:00:00
abstract:PURPOSE:Imaging using positron emission tomography (PET) in the field of nuclear medicine is becoming increasingly important. The aim of this study was to develop a method for labeling of affibody molecules with radiocobalt for PET applications. PROCEDURES:The human epidermal growth factor receptors type 2 (HER2) bind...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-009-0238-8
更新日期:2010-01-01 00:00:00
abstract:PURPOSE:Radioimmunotherapy uses tumor-specific antibodies to deliver therapeutic radionuclides, but hematological toxicity due to the long serum half-life of intact antibodies remains a challenge. We evaluated a smaller antibody fragment, the minibody, with faster kinetics and a potentially improved therapeutic index. ...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-020-01518-4
更新日期:2020-10-01 00:00:00
abstract:PURPOSE:Some patients cannot remain immobile for a long duration of 60 min, which is generally applied in the case of a 2-deoxy-2-[(18)F]fluoro-D-glucose ([(18)F]FDG) dynamic positron emission tomography (PET) scan. We investigated the change of the parametric values when the time duration of PET data was shortened. P...
journal_title:Molecular imaging and biology
pub_type: 临床试验,杂志文章
doi:10.1007/s11307-010-0384-z
更新日期:2011-08-01 00:00:00
abstract:PURPOSE:We aimed to explore the feasibility of transfection methods for antisense imaging. PROCEDURES:Antisense oligonucleotides (ASON) targeted to the mRNA of hTERT gene were synthesized and labeled with Technetium-99m and fluorescein isothiocyanate (FITC), respectively. Then, ASON was combined with transfection reag...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-015-0827-7
更新日期:2015-10-01 00:00:00
abstract:PURPOSE:In this study, the contrasting properties of human serum albumin nanoparticles (HSA-NPs) loaded with gadolinium-diethylenetriamine pentaacetic acid (Gd-DTPA) and coated with transferrin in MRI in mice are evaluated. PROCEDURES:HSA-NPs were conjugated with Gd-DTPA (Gd-HSA-NPs) and coupled with transferrin (Gd-H...
journal_title:Molecular imaging and biology
pub_type: 杂志文章
doi:10.1007/s11307-012-0579-6
更新日期:2013-04-01 00:00:00