Professional Summary
Education & Certifications
- Board Certification: American Board of Nuclear Medicine, Nuclear Medicine (2023)
- Board Certification: American Board of Radiology, Diagnostic Radiology (2024)
- Fellowship, Stanford University School of Medicine, Nuclear Medicine (2019)
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- Fellowship, Stanford University School of Medicine, Pediatric Radiology (2023)
- Residency: Stanford University Radiology Residency (2023) CA
- Internship: Stony Brook University Dept of Medicine (2018) NY
- Medical Education: Stony Brook University School of Medicine (2017) NY
- M.D., Stony Brook University School of Medicine (2017)
- Ph.D., Stony Brook University Department of Pharmacology, Biochemistry and Structural Biology (2015)
- M.S., Johns Hopkins University, Molecular and Cellular Biology (2007)
- B.S., Johns Hopkins University, Molecular and Cellular Biology (2006)
Honors & Awards
- Intern of the Year Award, Department of Medicine, Stony Brook University Hospital (2018)
- Julian David Baumert PhD Thesis Award, Brookhaven National Laboratory (2016)
- One to Watch Award, Society of Nuclear Medicine and Molecular Imaging (2023)
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- Resident Researcher Award, Nuclear Medicine and Molecular Imaging, Stanford University Hospital (2023)
- Ruth L. Kirschstein National Research Service Award, National Institutes of Health (2013-2015)
- Student Travel Stipend Award, Radiological Society of North America (2016)
Memberships
- Member, Nuclear Medicine Practice Parameters Writing Committee, American College of Radiology (2023 - Present)
- Member, Review Committee, World Molecular Imaging Congress (2023 - 2023)
- Intern, Pediatric Imaging Council, Society of Nuclear Medicine and Molecular Imaging (2023 - Present)
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- Member, Nuclear Medicine Committee, Society of Pediatric Radiology (2023 - Present)
- Editorial Board Member, Frontiers in Oncology: Cancer Imaging and Image-directed Interventions (2023 - Present)
- Resident Representative for Nuclear Medicine, Radiological Society of North America (2021 - 2022)
- Member, Stanford Medicine Abilities Coalition (2019 - Present)
- Member, American Society of Nuclear Cardiology (2018 - Present)
- Member, American College of Nuclear Medicine (2018 - Present)
- Fellow, Medical Scientist Training Program, National Institutes of Health (2008 - 2017)
Administrative Appointments
- Chief Resident, Nuclear Medicine and Diagnostic Radiology (NM/DR), Stanford University School of Medicine (2019 - 2020)
- Chief Resident, Nuclear Medicine and Diagnostic Radiology (NM/DR), Stanford University School of Medicine (2022 - 2023)
- Clinical Administrator, Outpatient MRI Clinic Injection Shifts, 732 Welch Road, Stanford Children's Health (2023 - 2023)
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- Co-director, Structured Reporting for Nuclear Medicine and Molecular Imaging, Department of Radiology (2024 - Present)
- IT Representative and EPIC Optimization Champion for Nuclear Medicine, Radiology IT Operations Committee, Stanford University Hospital (2019 - Present)
- Member, Molecular Imaging Program at Stanford (MIPS) (2023 - Present)
- Project Leader, Contrast Extravasation Workflows, 52-in-52 Quality Improvement Initiative (2021 - 2022)
- Wellness Champion, Nuclear Medicine and Molecular Imaging, Department of Radiology (2024 - Present)
Publications
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Prospective Evaluation of F-18-DCFPyL PET/CT and Conventional Imaging in Patients with Biochemically Recurrent Prostate Cancer
Song, H., Harrison, C., Guja, K., Franc, B., Moradi, F., Davidzon, G., … Iagaru, A. (2019). Prospective Evaluation of F-18-DCFPyL PET/CT and Conventional Imaging in Patients with Biochemically Recurrent Prostate Cancer. JOURNAL OF NUCLEAR MEDICINE. SOC NUCLEAR MEDICINE INC. -
Quantification of uptake in Ga-68-DOTATATE PET: Correlation between standardized uptake values and patient factors
Moradi, F., Guja, K., Aparici, C. M., & Iagaru, A. (2019). Quantification of uptake in Ga-68-DOTATATE PET: Correlation between standardized uptake values and patient factors. JOURNAL OF NUCLEAR MEDICINE, 60. -
Prospective evaluation of F-18- DCFPyL in Patients with Biochemically Recurrent Prostate Cancer: Positivity Rate and Correlation with PSA levels
Harrison, C., Song, H., Franc, B. L., Guja, K., Moradi, F., Davidzon, G., … Iagaru, A. (2019). Prospective evaluation of F-18- DCFPyL in Patients with Biochemically Recurrent Prostate Cancer: Positivity Rate and Correlation with PSA levels. JOURNAL OF NUCLEAR MEDICINE. SOC NUCLEAR MEDICINE INC. -
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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.
Song, H., Harrison, C., Duan, H., Guja, K., Hatami, N., Franc, B., … Iagaru, A. (2019). 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. -
Fungal endocarditis resembling primary cardiac malignancy in a patient with B-cell ALL with culture confirmation.
Girod, B. J., Guja, K. E., Davidzon, G., Chan, F., Zucker, E., Franc, B. L., … Aparici, C. M. (2020). Fungal endocarditis resembling primary cardiac malignancy in a patient with B-cell ALL with culture confirmation. Radiology Case Reports, 15(2), 117–19. -
Cost-effectiveness of magnetic resonance imaging versus ultrasound for the detection of symptomatic full-thickness supraspinatus tendon tears.
Gyftopoulos, S., Guja, K. E., Subhas, N., Virk, M. S., & Gold, H. T. (2017). Cost-effectiveness of magnetic resonance imaging versus ultrasound for the detection of symptomatic full-thickness supraspinatus tendon tears. Journal of Shoulder and Elbow Surgery, 26(12), 2067–2077. -
hnRNPA2 mediated acetylation reduces telomere length in response to mitochondrial dysfunction.
Guha, M., Srinivasan, S., Johnson, F. B., Ruthel, G., Guja, K., Garcia-Diaz, M., … Avadhani, N. G. (2018). hnRNPA2 mediated acetylation reduces telomere length in response to mitochondrial dysfunction. PloS One, 13(11), e0206897. -
Structure of human nSMase2 reveals an interdomain allosteric activation mechanism for ceramide generation.
Airola, M. V., Shanbhogue, P., Shamseddine, A. A., Guja, K. E., Senkal, C. E., Maini, R., … Hannun, Y. A. (2017). Structure of human nSMase2 reveals an interdomain allosteric activation mechanism for ceramide generation. Proceedings of the National Academy of Sciences of the United States of America, 114(28), E5549–E5558. -
HnRNPA2 is a novel histone acetyltransferase that mediates mitochondrial stress-induced nuclear gene expression.
Guha, M., Srinivasan, S., Guja, K., Mejia, E., Garcia-Diaz, M., Johnson, F. B., … Avadhani, N. G. (2016). HnRNPA2 is a novel histone acetyltransferase that mediates mitochondrial stress-induced nuclear gene expression. Cell Discovery, 2, 16045. -
Structural and Biochemical Basis for Intracellular Kinase Inhibition by Src-specific Peptidic Macrocycles.
Aleem, S., Georghiou, G., Kleiner, R. E., Guja, K., Craddock, B. P., Lyczek, A., … Seeliger, M. A. (2016). Structural and Biochemical Basis for Intracellular Kinase Inhibition by Src-specific Peptidic Macrocycles. Cell Chemical Biology, 23(9), 1103–1112. -
A fidelity mechanism in DNA polymerase lambda promotes error-free bypass of 8-oxo-dG.
Burak, M. J., Guja, K. E., Hambardjieva, E., Derkunt, B., & Garcia-Diaz, M. (2016). A fidelity mechanism in DNA polymerase lambda promotes error-free bypass of 8-oxo-dG. The EMBO Journal, 35(18), 2045–59. -
Nucleotide binding interactions modulate dNTP selectivity and facilitate 8-oxo-dGTP incorporation by DNA polymerase lambda.
Burak, M. J., Guja, K. E., & Garcia-Diaz, M. (2015). Nucleotide binding interactions modulate dNTP selectivity and facilitate 8-oxo-dGTP incorporation by DNA polymerase lambda. Nucleic Acids Research, 43(16), 8089–99. -
Unraveling Cholesterol Catabolism in Mycobacterium tuberculosis: ChsE4-ChsE5 a2ß2 Acyl-CoA Dehydrogenase Initiates ß-Oxidation of 3-Oxo-cholest-4-en-26-oyl CoA.
Yang, M., Lu, R., Guja, K. E., Wipperman, M. F., St Clair, J. R., Bonds, A. C., … Sampson, N. S. (2015). Unraveling Cholesterol Catabolism in Mycobacterium tuberculosis: ChsE4-ChsE5 a2ß2 Acyl-CoA Dehydrogenase Initiates ß-Oxidation of 3-Oxo-cholest-4-en-26-oyl CoA. ACS Infectious Diseases, 1(2), 110–125. -
Completing the specificity swap: Single-stranded DNA recognition by F and R100 TraI relaxase domains.
Guja, K. E., & Schildbach, J. F. (2015). Completing the specificity swap: Single-stranded DNA recognition by F and R100 TraI relaxase domains. Plasmid, 80, 1–7. -
A distinct MaoC-like enoyl-CoA hydratase architecture mediates cholesterol catabolism in Mycobacterium tuberculosis.
Yang, M., Guja, K. E., Thomas, S. T., Garcia-Diaz, M., & Sampson, N. S. (2014). A distinct MaoC-like enoyl-CoA hydratase architecture mediates cholesterol catabolism in Mycobacterium tuberculosis. ACS Chemical Biology, 9(11), 2632–45. -
Non-stop mRNA decay: a special attribute of trans-translation mediated ribosome rescue.
Venkataraman, K., Guja, K. E., Garcia-Diaz, M., & Karzai, A. W. (2014). Non-stop mRNA decay: a special attribute of trans-translation mediated ribosome rescue. Frontiers in Microbiology, 5, 93. -
Organization of the human mitochondrial transcription initiation complex.
Yakubovskaya, E., Guja, K. E., Eng, E. T., Choi, W. S., Mejia, E., Beglov, D., … Garcia-Diaz, M. (2014). Organization of the human mitochondrial transcription initiation complex. Nucleic Acids Research, 42(6), 4100–12. -
A remote palm domain residue of RB69 DNA polymerase is critical for enzyme activity and influences the conformation of the active site.
Jacewicz, A., Trzemecka, A., Guja, K. E., Plochocka, D., Yakubovskaya, E., Bebenek, A., & Garcia-Diaz, M. (2013). A remote palm domain residue of RB69 DNA polymerase is critical for enzyme activity and influences the conformation of the active site. PloS One, 8(10), e76700. -
Structural basis for S-adenosylmethionine binding and methyltransferase activity by mitochondrial transcription factor B1.
Guja, K. E., Venkataraman, K., Yakubovskaya, E., Shi, H., Mejia, E., Hambardjieva, E., … Garcia-Diaz, M. (2013). Structural basis for S-adenosylmethionine binding and methyltransferase activity by mitochondrial transcription factor B1. Nucleic Acids Research, 41(16), 7947–59. -
Structure of the essential MTERF4:NSUN4 protein complex reveals how an MTERF protein collaborates to facilitate rRNA modification.
Yakubovskaya, E., Guja, K. E., Mejia, E., Castano, S., Hambardjieva, E., Choi, W. S., & Garcia-Diaz, M. (2012). Structure of the essential MTERF4:NSUN4 protein complex reveals how an MTERF protein collaborates to facilitate rRNA modification. Structure (London, England : 1993), 20(11), 1940–7. -
Hitting the brakes: termination of mitochondrial transcription.
Guja, K. E., & Garcia-Diaz, M. (2011). Hitting the brakes: termination of mitochondrial transcription. Biochimica Et Biophysica Acta, 1819(9-10), 939–47. -
Using fluorophore-labeled oligonucleotides to measure affinities of protein-DNA interactions.
Anderson, B. J., Larkin, C., Guja, K., & Schildbach, J. F. (2008). Using fluorophore-labeled oligonucleotides to measure affinities of protein-DNA interactions. Methods in Enzymology, 450, 253–72. -
An intrastrand three-DNA-base interaction is a key specificity determinant of F transfer initiation and of F TraI relaxase DNA recognition and cleavage.
Hekman, K., Guja, K., Larkin, C., & Schildbach, J. F. (2008). An intrastrand three-DNA-base interaction is a key specificity determinant of F transfer initiation and of F TraI relaxase DNA recognition and cleavage. Nucleic Acids Research, 36(14), 4565–72. -
Reviewing the Reviewers: The Timeliness of Peer Review in Radiology Journals
Guja, K. E., Janardhanan, A., Stavro, J., Castillo, M., & Schweitzer, M. E. (2016). Reviewing the Reviewers: The Timeliness of Peer Review in Radiology Journals. Radiological Society of North America. -
An unusual presentation of recurrent T cell lymphoma: angiocentric pattern of cutaneous uptake on [18F]FDG PET/CT.
Guja, K. E., Brown, R., Girod, B., Song, H., Harrison, C., Franc, B. L., … Aparici, C. M. (2020). An unusual presentation of recurrent T cell lymphoma: angiocentric pattern of cutaneous uptake on [18F]FDG PET/CT. European Journal of Nuclear Medicine and Molecular Imaging. -
Prospective evaluation of F-18-DCFPyL PET/CT in biochemically recurrent prostate cancer: Analysis of lesion localization and distribution.
Song, H., Duan, H., Harrison, C., Guja, K., Hatami, N., Franc, B. L., … Iagaru, A. (2020). Prospective evaluation of F-18-DCFPyL PET/CT in biochemically recurrent prostate cancer: Analysis of lesion localization and distribution. JOURNAL OF CLINICAL ONCOLOGY. AMER SOC CLINICAL ONCOLOGY. -
Peptide receptor radionuclide therapy (PRRT) for neuroendocrine tumors (NET): A two-year single institution experience
Duan, H., Ninatti, G., Girod, B., Ferri, V., Guja, K., Song, H., … Aparici, C. M. (2020). Peptide receptor radionuclide therapy (PRRT) for neuroendocrine tumors (NET): A two-year single institution experience. JOURNAL OF NUCLEAR MEDICINE. SOC NUCLEAR MEDICINE INC. -
18F-FDG PET/CT for Evaluation of Post-Transplant Lymphoproliferative Disorder (PTLD).
Song, H., Guja, K. E., & Iagaru, A. (2021). 18F-FDG PET/CT for Evaluation of Post-Transplant Lymphoproliferative Disorder (PTLD). Seminars in Nuclear Medicine. -
The Clinical Utility of 18F-Fluciclovine PET/CT in Biochemically Recurrent Prostate Cancer: an Academic Center Experience Post FDA Approval.
Nakamoto, R., Harrison, C., Song, H., Guja, K. E., Hatami, N., Nguyen, J., … Iagaru, A. (2021). The Clinical Utility of 18F-Fluciclovine PET/CT in Biochemically Recurrent Prostate Cancer: an Academic Center Experience Post FDA Approval. Molecular Imaging and Biology. -
Phantom study of SPECT/CT augmented reality for intraoperative localization of sentinel lymph nodes in head and neck melanoma.
Nakamoto, R., Zhuo, J., Guja, K. E., Duan, H., Perkins, S. L., Leuze, C., … Franc, B. L. (1800). Phantom study of SPECT/CT augmented reality for intraoperative localization of sentinel lymph nodes in head and neck melanoma. Oral Oncology, 125, 105702. -
PSMA theragnostics for metastatic castration resistant prostate cancer.
Song, H., Guja, K. E., & Iagaru, A. (2022). PSMA theragnostics for metastatic castration resistant prostate cancer. Translational Oncology, 22, 101438. -
Test Yourself: 7-month-old female with an enlarging left axillary mass.
Guja, K. E., Hazard, F. K., & Fadell, M. (2022). Test Yourself: 7-month-old female with an enlarging left axillary mass. Skeletal Radiology. -
Overview and Recent Advances in 18F-FDG PET/CT for Evaluation of Pediatric Lymphoma
Guja, K. E., Nadel, H., & Iagaru, A. (2023). Overview and Recent Advances in 18F-FDG PET/CT for Evaluation of Pediatric Lymphoma. Seminars in Nuclear Medicine, 53(3). -
HnRNPA2 is a novel histone acetyltransferase that mediates mitochondrial stress-induced nuclear gene expression (vol 2, 16045, 2016)
Guha, M., Srinivasan, S., Guja, K., Mejia, E., Garcia-Diaz, M., Johnson, F. B., … Avadhani, N. G. (2019). HnRNPA2 is a novel histone acetyltransferase that mediates mitochondrial stress-induced nuclear gene expression (vol 2, 16045, 2016). CELL DISCOVERY, 5, 28. -
Response to Nazarian et al regarding: "Cost-effectiveness of magnetic resonance imaging versus ultrasound for the detection of symptomatic full-thickness supraspinatus tendon tears"
Gyftopoulos, S., Guja, K. E., Subhas, N., Virk, M. S., & Gold, H. T. (2018). Response to Nazarian et al regarding: "Cost-effectiveness of magnetic resonance imaging versus ultrasound for the detection of symptomatic full-thickness supraspinatus tendon tears". JOURNAL OF SHOULDER AND ELBOW SURGERY, 27(10), E320–E321. -
64Cu-DOTATATE Uptake in a Pulmonary Hamartoma
Song, H., Guja, K. E., Yang, E. J., & Guo, H. H. (2022). 64Cu-DOTATATE Uptake in a Pulmonary Hamartoma. Clinical Nuclear Medicine, 48(1). -
Molecular Imaging in Soft-tissue Sarcoma: Evolving Role of FDG PET.
Guja, K. E., Ganjoo, K. N., & Iagaru, A. (2024). Molecular Imaging in Soft-tissue Sarcoma: Evolving Role of FDG PET. Seminars in Nuclear Medicine. -
Flip-flop: Two tracers are better than one in pediatric PET/MRI for neuroendocrine neoplasms
Guja, K. E., & Nadel, H. R. (2023). Flip-flop: Two tracers are better than one in pediatric PET/MRI for neuroendocrine neoplasms. Journal of Nuclear Medicine, 64(1). -
Molecular Imaging with PET/CT and PET/MRI in Pediatric Musculoskeletal Diseases
Guja, K. E., Behr, G., Bedmutha, A., Kuhn, M., Nadel, H. R., & Pandit-Taskar, N. (2024). Molecular Imaging with PET/CT and PET/MRI in Pediatric Musculoskeletal Diseases. Seminars in Nuclear Medicine. -
Adverse Events in Targeted Radiopharmaceutical Therapy
Guja, K. E., Wu, J., Agordzo, H. L., Kwofie, J., Samaan, D., Nadel, H. R., … Shah, J. (2024). Adverse Events in Targeted Radiopharmaceutical Therapy. RadioGraphics.
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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.
Clinical Trials
Clinical trials are research studies that evaluate a new medical approach, device, drug, or other treatment. As a Stanford Health Care patient, you may have access to the latest, advanced clinical trials.
Open trials refer to studies currently accepting participants. Closed trials are not currently enrolling, but may open in the future.
- [177Lu]-NeoB in Patients With Advanced Solid Tumors and With [68Ga]-NeoB Lesion Uptake
- Pediatric PET/MR Image Registry
- Study of PRRT in Metastatic, World Health Organization (WHO) Grade 1 or 2, SSTR Positive, GEP-NET Who Are Candidates for Cytoreductive Surgery
- Safety, PK and Biodistribution of 18F-OP-801 in Patients With ALS, AD, MS, PD and Healthy Volunteers
- 99mTc Sestamibi SPECT/CT vs 18F Fluorocholine PET/CT
- A Phase I Study of [177Lu]Lu-EVS459 in Patients With Ovarian and Lung Cancers
- Development of Radiation Free Whole Body Magnetic Resonance (MR) Imaging Technique for Staging Children With Cancer
Practice Locations
SHC- Nuclear Medicine (300P) Stanford, CA
Stanford, CAImportant Information about Our Organizations and Physician Affiliation
Stanford Health Care, Stanford Health Care Tri-Valley, and Stanford Medicine Partners are each independent nonprofit organizations that are affiliated with but separate from each other and from Stanford University. The physicians who provide care at facilities operated by Stanford Health Care, Stanford Health Care Tri-Valley, and Stanford Medicine Partners are faculty, foundation, or community physicians who are not employees, representatives, or agents of Stanford Health Care, Stanford Health Care Tri- Valley, or Stanford Medicine Partners. Stanford Health Care, Stanford Health Care Tri-Valley, and Stanford Medicine Partners do not exercise control over the care provided by such faculty, foundation, and community physicians and are not responsible for their actions.
Referring Physicians
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