Pilot Study: Imaging Tumor Extent and Response Before and After Neoadjuvant Chemotherapy and Radiotherapy in Locally Advanced Rectal Cancer Using 64Cu-Labeled M5A Antibody to Carcinoembryonic Antigen (CEA)

This early phase I trial investigates how well 64Cu-labeled M5A antibody scan works in assessing tumor activity before and after patients with rectal cancer that has spread to nearby tissue or lymph nodes (locally advanced) who are undergoing chemotherapy and radiotherapy. Using 64Cu-labeled M5A positron emission tomography imaging may play a significant role in imaging patients with colorectal cancer.

Yttrium-90 Carbon Microspheres in Patients With Unresectable Colorectal Liver Metastases: A Multicentre, Prospective, Open-label, Single-arm Trial

To evaluate the efficacy and safety of yttrium-90 carbon microspheres in patients with unresectable colorectal liver metastases

A Phase I Study to Evaluate the Safety and Dosimetry of 68Ga-labelled OncoFAP Derivatives in Patients With Solid Tumors

Phase I, multicenter study in patients with a confirmed diagnosis of solid tumor among breast cancer, colorectal cancer, oesophageal cancer and pancreatic adenocarcinoma, requiring clinical staging for nodal staging and/or metastatic disease (based on institutional practice and risk stratification). All patients will receive a single intravenous bolus administration of 250 MBq (225 - 275 MBq). [68Ga]Ga-OncoFAP biodistribution, PK, and dosimetry of [68Ga]Ga-OncoFAP will be assessed based on a series of PET/CT scans, blood and urine sampling.

Evaluation of 89Zr-DFO-nimotuzumab for Non-invasive Imaging of EGFR Positive Cancers by Positron Emission Tomography (PET)

Over-expression of Epidermal Growth Factor Receptor (EGFR) on cells occurs in all aggressive cancers of epithelial origin. Existing tests for monitoring EGFR expression are invasive and not reliable. There needs to be a better way to measure EGFR expression in cancerous tumors to better tailor cancer treatments. This clinical trial aims to demonstrate the feasibility of imaging cancers that express EGFR using 89Zr-DFO-nimotuzumab and Positron Emission Tomography (PET)/Computerized Tomography (CT). By non-invasively imaging the status of EGFR, 89Zr-DFO-nimotuzumab could be used to assist in the identification of patients who are likely to respond to anti-EGFR treatments, including nimotuzumab. The hypothesis is that 89Zr-DFO-nimotuzumab will accumulate to tumors over-expressing EGFR making them visible when imaged with PET/CT. This hypothesis will be tested in this study, along with the optimal imaging time and diagnostic ability.

The Value of PET / MRI for the Assessment of Lymph Node Metastasis and Other Prognostic Factors in Patients With Rectal Cancer

The combination of FDG-PET/CT and MRI at staging of rectal cancer in diagnosis is currently very little studied. The investigator have a unique opportunity to study this. Hypothetically, with PET/MR as one hybrid imaging method, alternatively as an additional method, it could increase the accuracy of rectal cancer of moderate and high risk type, especially at primary N-staging, but also in assessing other important prognostic factors such as T-staging, peritoneal involvement, metastasis to lateral lymph nodes, EMVI and MRF involvement. The same reasoning applies to the assessment of tumor regression after CRT. In the study, PET/MR is compared with PET/CT, diagnostic CT and MRI to evaluate the additional value of the hybrid imaging PET/MRI. The investigator also plan to evaluate how immunological, proliferative and prognostic biomarkers in blood and tumor tissue correlate with the radiological findings, and if the combination biomarker and radiology can provide additional prognostic information.

Preoperative Y-90 Radioembolization for Tumor Control and Future Liver Remnant Hypertrophy in Patients With Colorectal Liver Metastases

A prospective, interventional study evaluating the safety of Y-90 TARE for tumor control of the right side and induction of left liver hypertrophy as part of a planned single-stage or two-stage hepatectomy for patients with CLM and insufficient FLR at the time of presentation.

68Ga-FAPI-04 PET Imaging in Early Response Evaluation of Rectal Cancer Patients Treated With Immunotherapy: A Single-center Clinical Study

This study is a prospective monocentric study aimed to explore the value of 68Ga-FAPI-04 PET imaging in early response evaluation of rectal cancer patients treated with immunotherapy. Patients with histopathologically confirmed diagnosis of rectal cancer will be recruited and undergo 68Ga-FAPI-04 and 18F-FDG PET imaging before treatment and after short-course radiotherapy and two cycles of neoadjuvant chemotherapy plus immunotherapy. The two imaging intervals will be completed two days apart. The efficacy of 68Ga-FAPI-04 in early response evaluation will be compared with the general imaging agent 18F-FDG. The general information, clinical data, mpMRI data, 68Ga-FAPI-04 and 18F-FDG PET imaging results and other imaging data of the patients will be collected. The histopathology of the biopsy or surgical specimen after 2 cycles of therapy and follow-up data will be taken as evaluation references. This study plans to set the sample size as 20 cases

68Ga-NOTA-PEG2-RM26 PET/CT: Tracer Biodistribution and Uptake in Different Kinds of Cancer With Gastrin-Releasing Peptide Receptor (GRPR) Overexpression

The gastrin-releasing peptide receptor (GRPR), also known as bombesin receptor subtype II (BB2), is a member of the G protein-coupled receptor family of bombesin receptors. GRPR is over-expressed in various types of human tumors. RM26, a GRPR antagonist with high affinity, was discovered by peptide backbone modification of bombesin analogues. To target gastrin-releasing peptide receptor in human neoplastic cells NOTA-PEG2-RM26 was synthesised and then labeled with 68Ga. An open-label whole-body PET/ CT study was designed to investigate the safety and dosimetry of 68Ga-NOTA-PEG2-RM26 and to assess its clinical diagnostic value in patients with cancer.