---
title: "Imaging the Invisible: Granzyme B and the Future of Immunotherapy Monitoring with Guest Dr. Ben Larimer"
description: "Tune into Fractals: Life Science Conversations with Hatch BioFund Managing Partner Dr. Lorenzo Pellegrini"
---

[Podcast ](https://www.thebrackengroup.com/podcast)

# [Imaging the Invisible: Granzyme B and the Future of Immunotherapy Monitoring with Guest Dr. Ben Larimer](https://www.thebrackengroup.com/podcast/imaging-the-invisible-granzyme-b-and-the-future-of-immunotherapy-monitoring-with-guest-dr.-ben-larimer)

 Written by [Fractals: Life Science Conversations](https://www.thebrackengroup.com/podcast/author/fractals-life-science-conversations) | Jun 11, 2025 4:13:09 PM

 

As a scientist, innovator, and CEO of CytoSite BioPharma,[ Dr. Ben Larimer](https://www.linkedin.com/in/benjamin-larimer-9aa78a4a/) has reshaped how we think about imaging immune response in cancer. His work on Granzyme B PET imaging is unlocking unprecedented insights into whether—and where—immunotherapies are working inside the body. 

In this episode of *Fractals*, Ben joins host Colin Miller to discuss: 

- The origins of Granzyme B imaging and what makes it a uniquely powerful imaging agent. 

- How CytoSite’s imaging agent revealed success in preclinical models—and sparked a new clinical path forward. 

- The balance between scientific innovation and real-world biotech execution. 

- Why PET imaging’s future depends on AI, cost reduction, and deeper diagnostic precision. 

Tune into *Fractals: Life Science Conversations* wherever you get your podcasts—and [contact Bracken](https://thebrackengroup.slack.com/archives/D054SNVE5HP/p1748368326564469) to learn how we help imaging agents move from molecule to market.

<https://podcasts.apple.com/us/podcast/imaging-the-invisible-granzyme-b-and-the/id1707100631?i=1000712445300><https://open.spotify.com/episode/6ogGApW9JPQwRx32fN88to?si=4ec2bba2edb94e54>

###### [Click here to read the transcript version of this episode.](https://www.thebrackengroup.com/imaging-the-invisible-granzyme-b-and-the-future-of-immunotherapy-monitoring-transcript)

 

 

[View full post](https://www.thebrackengroup.com/podcast/imaging-the-invisible-granzyme-b-and-the-future-of-immunotherapy-monitoring-with-guest-dr.-ben-larimer)

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