- Nuclear Medicine
Clinical Professor, Radiology - Rad/Nuclear Medicine
Board Certification: Nuclear Medicine, American Board of Nuclear Medicine (2005)
Residency: Stanford Hospital and Clinics (2005) CA
Medical Education: Universitat de Valencia (1992) Spain
Engaging Self-regulation Targets to Improve Mood and Weight and Understand Mechanism in Depressed and Obese Adults
Multimorbidity (i.e., the coexistence of 2 or more chronic conditions in an individual) is increasingly recognized as a pressing public health problem. Effective interventions targeting coexisting depression and obesity are critical given the high prevalence and worsened outcomes for patients with both conditions. ENGAGE-2 is a pilot randomized controlled trial (RCT). The objective is to investigate the outcomes and mechanisms of an integrated depression and obesity intervention that combines collaborative stepped depression treatment and evidence-based behavioral weight loss treatment. The Integrated Coaching for Better Mood and Weight-2 (I-CARE2) intervention synergistically integrates 2 proven national programs: the Program to Encourage Active and Rewarding Lives (PEARLS) for depression care and the Group Lifestyle Balance (GLB) program for weight loss and cardiometabolic risk reduction. In Phase 1 of the ENGAGE project, investigators developed a new protocol to quantify activation and connectivity of the Affective, Cognitive Control, and Default Mode brain circuits from functional magnetic resonance imaging (fMRI) among 108 depressed obese patients. Investigators implement the same fMRI protocol in this second phase of the project to examine the mechanistic role of these brain circuits as potential neural targets in treatment engagement and response in the I-CARE2 intervention. A new sample of 105 depressed obese patients are randomized in a 2:1 ratio to receive the I-CARE2 intervention (n=70) or usual care (n=35). Study assessments occur at 0 (baseline), 2 and 6 months. Investigators hypothesize that 1 or more of the neural targets under study will moderate (baseline state) and/or mediate (change at follow-up) the effect of the I-CARE2 intervention versus usual care on health behaviors (problem-solving ability, dietary intakes, physical activity) and clinical outcomes (weight loss, depression, anxiety).
Stanford is currently not accepting patients for this trial.
Prospective Evaluation in an Academic Center of 18F-DCFPyL PET/CT in Biochemically Recurrent Prostate Cancer: A Focus on Localizing Disease and Changes in Management.
Journal of nuclear medicine : official publication, Society of Nuclear Medicine
18F-DCFPyL is a promising PET radiopharmaceutical targeting prostate specific membrane antigen (PSMA). We present our experience in this single academic center prospective study evaluating the positivity rate of 18F-DCFPyL PET/CT in patients with biochemical recurrence (BCR) of prostate cancer (PC). Methods: We prospectively enrolled 72 men (52-91 years old, mean±SD: 71.5±7.2) with BCR after primary definitive treatment with prostatectomy (n = 42) or radiotherapy (n = 30). The presence of lesions compatible with PC was evaluated by two independent readers. Fifty-nine patients had concurrent scans with at least one other conventional scan: bone scan (24), CT (21), MR (20), 18F-Fluciclovine PET/CT (18) and/or 18F-NaF PET (14). Findings from 18F-DCFPyL PET/CT were compared with those from other modalities. Impact on patient management based on 18F-DCFPyL PET/CT was recorded from clinical chart review. Results: 18F-DCFPyL PET/CT had an overall positivity rate of 85%, which increased with higher prostate specific antigen (PSA) levels (ng/mL): 50% (PSA<0.5), 69% (0.5≤PSA<1), 100% (1≤PSA<2), 91% (2≤PSA<5) and 96% (PSA≥5), respectively. 18F-DCFPyL PET detected more lesions than conventional imaging. For anatomic imaging, 20/41 (49%) CT/MRI had congruent findings with 18F-DCFPyL, while 18F-DCFPyL PET was positive in 17/41 (41%) cases with negative CT/MRI. For bone imaging, 26/38 (68%) bone scan/18F-NaF PET were congruent with 18F-DCFPyL PET, while 18F-DCFPyL PET localized bone lesions in 8/38 (21%) patients with negative bone scan/18F-NaF PET. In 8/18 (44%) patients, 18F-Fluciclovine PET had located the same lesions as the 18F-DCFPyL PET, while 5/18 (28%) patients with negative 18F-Fluciclovine had positive 18F-DCFPyL PET findings and 1/18 (6%) patient with negative 18F-DCFPyL had uptake in the prostate bed on 18F-Fluciclovine PET. In the remaining 4/18 (22%) patients, 18F-DCFPyL and 18F-Fluciclovine scans showed different lesions. Lastly, 43/72 (60%) patients had treatment changes after 18F-DCFPyL PET and, most noticeably, 17 of these patients (24% total) had lesion localization only on 18F-DCFPyL PET, despite negative conventional imaging. Conclusion: 18F-DCFPyL PET/CT is a promising diagnostic tool in the work-up of biochemically recurrent prostate cancer given the high positivity rate as compared to FDA-approved currently available imaging modalities and its impact on clinical management in 60% of patients.
View details for DOI 10.2967/jnumed.119.231654
View details for PubMedID 31628216
[Introduction to the molecular imaging].
Revista espanola de medicina nuclear
2006; 25 (6): 394-409
View details for PubMedID 17173791