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Inveon micro pet ct rodent model scanner

Manufactured by Siemens
Sourced in Germany

The Inveon micro-PET/CT rodent model scanner is a preclinical imaging system designed for imaging small animals, such as rodents. The device combines positron emission tomography (PET) and computed tomography (CT) technologies to provide high-resolution, three-dimensional images of the subject's anatomy and function.

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5 protocols using inveon micro pet ct rodent model scanner

1

In-vivo PET Imaging of DTN Biodistribution

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A 60-min dynamic PET imaging was performed to monitor the biodistribution process of DTN in vivo. PET scans were carried out on an Inveon micro-PET/CT rodent model scanner (Siemens Medical Solutions, Erlangen, Germany). Mice were anesthetized under 2%–3% isoflurane and the tail veins were catheterized, PET images were acquired while 50 μCi (1.85 MBq) of 64Cu-DTN was intravenously injected into female ICR (CD-1®) Outbred mice (ICR mice, Envigo, Madison, WI, USA). The histogram file was reframed a total of 40 frames: 10 s × 6 frames, 20 s × 6 frames, 30 s × 6 frames, 60 s × 6 frames, and 180 s × 16 frames. Ordered subsets expectation maximization 3D or maximum a posteriori (OSEM3D/MAP) was used as the reconstruction algorithm.
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2

In Vivo Imaging of Kidney Injury

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Following 89Zr labeling of SeCQDs, 80–120 µCi (2.96‐4.44 MBq) of 89Zr‐DFO‐SeCQDs was administered intravenously to ICR mice that were either healthy or had AKI induced by either 50% glycerol or cisplatin (n = 3). Longitudinal positron emission tomography (PET) scans were obtained using an Inveon microPET/CT rodent model scanner (Siemens Healthineers, Germany). At the time point of interest, mice were anesthetized with isoflurane (2% in oxygen) and placed on the bed of the PET scanner. During the initial three time‐points (5 min, 1 h, 4 h) p.i., 40 million coincidence events were collected whereas 30 million were collected for the remaining. PET data was reconstructed by 3D ordered‐subset expectation maximization followed by maximum a posteriori reconstruction (OSEM3D/MAP) and decay corrected using the Inveon Research Workplace software (Siemens Healthineers, Germany). Region‐of‐interests were drawn at each time‐point to quantify the biodistribution in each tissue of interest (blood, liver, spleen, kidney, bone). After the PET scan at the terminal time‐point, the mice were euthanized, and the organs were collected to quantify biodistribution ex vivo using a gamma counter (Perkin Elmer, USA). SeCQDs uptake in tissue was determined as a percentage of the injected dose per gram of tissue (%ID/g).
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3

In Vivo PET Imaging of 64Cu-DTN

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A 30-min dynamic PET imaging was performed to monitor the biodistribution process of DTN in vivo. PET scans were carried out on an Inveon micro-PET/CT rodent model scanner (Siemens Medical Solutions, Erlangen, Germany). Mice were anesthetized under 2%–3% isoflurane and the tail veins were catheterized, PET images were acquired while 50 μCi (1.85 MBq) of 64Cu-DTN was intravenously injected into female ICR mice. The histogram file was reframed a total of 28 frames: 10 s × 6 frames, 30 s × 6 frames, 60 s × 6 frames, and 120 s × 10 frames. Ordered subsets expectation maximization 3D or maximum a posteriori (OSEM3D/MAP) was used as the reconstruction algorithm. Region-of-interest (ROI) analysis was performed to quantify the time-activity curve for organs of interest. Tracer accumulation was expressed as %ID/g. An image-based estimation of the arterial concentration of 64Cu-DTN from ROI results of the heart was employed to determine the PK of the tracer.
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4

64Cu-NOTA-pertuzumab Tumor Uptake Imaging

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PET imaging was performed on the Inveon micro-PET/CT rodent model scanner (Siemens Medical Solutions, Erlangen, Germany). Tumor-bearing mice were intravenously (i.v.) injected with 5–10 MBq of 64Cu-NOTA-pertuzumab or 64Cu-NOTA-IgGNonspecific, and PET scans were conducted at 3, 24, and 48 h after injection. For orthotopic groups, PET/CT scans were performed at the last time point. Following the terminal PET or PET/CT scan, mice were sacrificed, and organs of interest were harvested to validate the imaging data. A gamma counter (PerkinElmer, Waltham, MA, USA) was used to quantify tracer uptake in various tissues and organs, and accumulations were denoted by percentage of injected dose per gram of tissue (%ID/g; ≥ 3 mice per group).
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5

Pharmacokinetics of Zirconium-89 Labeled Antibody Probes

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The mice bearing tumor (subcutaneous (S.C.) and orthotopic model) was intravenously administered with 5.5 ~ 7.4 MBq of 89Zr-DFO-AF650 or 89Zr-DFO-IgG and scanned on an Inveon micro-PET/CT rodent model scanner (Siemens Medical Solutions) at several intervals (4, 24, 48, 72, 96, and 120 h) post injection. After 5-day scanning, the major organs (e.g., the heart, spleen, kidney, liver, and tumor) were harvested for quantification of the tracer accumulated on PET/CT scanner or a gamma counter (PerkinElmer). The biodistribution (BioD) among organs was analyzed and presented as a percentage of injected dosage/gram of organ (%ID/g). Size of tumor was calculated by following formula: 1/2(length × width2). The region of interest (ROI) were drawn on key tissues (including the heart, spleen, kidney, liver, tumor, and muscle) for studying the pharmacokinetics of 89Zr-DFO-AF650. The linear regression (ROI and BioD) and heat map (ROI) analysis were also performed for further confirmations of the correlation (ROI and BioD) and ROI significance among Trop-2-positive and Trop-2-negative groups.
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