Heart/Mediastinal Ratio Study for Potential Equivalence of Heart/Mediastinal Ratios at One and Two Hours to the Traditional Heart/Mediastinal Ratio Obtained at Four Hours

• Conditions: Neuroendocrine Tumor
• Interventions: Other: Standard of care diagnostic MIBG scan for neuroendocrine tumor diagnosis.

• Registration Number: NCT01448083
• Lead Sponsor: Nuclear Medicine Consultants, Inc.

Brief Summary

The purpose of this study is to determine if the measurement (with a standard nuclear camera) of radioactivity normally present in the nervous system of your heart at four hours after the injection of radioactive drug for your diagnostic I-123 MIBG scan is any different than radioactivity measured in your heart at one and/or two hours after your diagnostic scan injection. If equivalent information to the conventional 4 hr H/M ratio could be collected by obtaining H/M ratios at 1 or 2 hour windows, it would greatly facilitate patient acceptance of the procedure since the requirements for obtaining a valid H/M ratio would be considerably less time-consuming.

One hour before being injected with the drug (I-123 MIBG) for your MIBG scan, you will be given a standard dose of non-radioactive iodine (Lugol's solution) to block your thyroid from receiving the small amount of radiation that is a normal part of the MIBG scan. You will then be injected with MIBG, and you will have 10 minute pictures of your chest at 15 minutes, 1 hour, 2 hours, and 4 hours in addition to the standard 24 hour pictures. These pictures will be taken in the Nuclear Medicine Section, Department of Radiology at Ochsner Medical Center-Kenner. The experimental (research) part of this study is having the extra 10-minute pictures of your chest at 15 minutes, 1 hour, 2 hours, and 4 hours. Normally, pictures are only taken 24 hours after the injection. Therefore the research is limited to the four extra pictures taken, and involve no additional injections or I-123 drug beyond that you will be receiving regardless of whether you are part of this research.

Detailed Description

Not available

Study Timeline

• Study Start: 2011-10
• Study First Submitted: 2011-10-03
• Study First Submitted QC: 2011-10-05
• Study First Posted: 2011-10-07
• Status Verified: 2012-09
• Last Update Submitted: 2012-09-16
• Last Update Posted: 2012-09-18

Recruitment & Eligibility

• Status: UNKNOWN
• Sex: All
• Target Recruitment: 40

Inclusion Criteria

1. NET patients who are potential candidates for I-131 MIBG therapy, and are having whole body I-123 MIBG scintigraphy as standard of care.
2. Male or female patients ≥ 18 years of age.
3. Written informed consent from patients obtained in accordance to local guidelines.
4. History and physical exam indicating low likelihood, < 10 %, of any significant cardiac disease.
5. Echocardiogram within normal limits, including absence of valvular disease and normal LVEF.
6. Serum BNP within normal limits. -

Exclusion Criteria

1. Patients on drugs which interfere with MIBG uptake - tricyclic antidepressants, phenylpropanolamine, pseudephredine, phenylephrine, sympathomimetics, amphetamines, reserpine, thorazine and thiothixines, calcium channel blockers, cocaine, and long-acting beta blockers.
2. >10% likelihood of any significant heart disease, including myocardial ischemia, cardiomyopathies, uncontrolled hypertension, congestive heart failure and valvular heart disease, e.g. see "Likelihood of Assessment of Coronary Artery Disease" below.
3. History of uncontrolled diabetes mellitus
4. Signs/symptoms of neurological diseases (e.g., Parkinsonian syndromes) or other disease known to affect the sympathetic nervous system.
5. Female patients who are pregnant or nursing (lactating), or adults of reproductive potential who are not using effective birth control methods. If there is any question of pregnancy, a serum bHCg will be collected.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Arm && Interventions

Group	Intervention	Description
Neuroendocrine tumor patients	Standard of care diagnostic MIBG scan for neuroendocrine tumor diagnosis.	-

Primary Outcome Measures

Name	Time	Method
The heart/mediastinal ratio (H/M) at one or two hours post injection of AdreView™ (I-123 MIBG) in neuroendocrine tumor patients is equivalent to the standard 4 hr calculation.	Approximately 10 months

Trial Locations

Locations (1)

Ochsner Medical Center - Kenner; 🇺🇸 Kenner, Louisiana, United States