About

Hamed Ahmadi, MD, is an Assistant Professor in the Department of Urology at the University of Minnesota. He attended Tehran University of Medical Sciences for his medical education and completed his residency training in Urologic Surgery at Oregon Health and Science University in Portland, Oregon. He recently completed a fellowship in Urologic Oncology at the University of Southern California and joined the department shortly thereafter. Dr. Ahmadi specializes in the open and minimally invasive management of complex genitourinary cancers. His main research interest is tumor marker-based management of bladder and testis cancer.

Research topics

• Computer Science
• Medicine
• Artificial Intelligence
• Internal medicine
• Telecommunications
• Biology
• Urology
• Oncology
• General surgery
• Radiology

Selected publications

• PD09-14 IMPACT OF COMPUTATIONAL HISTOLOGY AI BIOMARKERS ON TREATMENT DECISION-MAKING IN ROUTINE CLINICAL MANAGEMENT FOR NON-MUSCLE INVASIVE BLADDER CANCER

  The Journal of Urology · 2026-04-27

  article
  PublisherDOI

• IP61-02 ARTIFICIAL INTELLIGENCE MODEL ACCURATELY PREDICTS 30-DAY EMERGENCY ROOM VISIT AND RE-ADMISSION AFTER UROLOGIC SURGERIES USING PATIENT PORTAL MESSAGES

  The Journal of Urology · 2026-04-27

  articleSenior author
  PublisherDOI

• IP74-07 PREDICTING THE UNPLANNED: A LOW-BURDEN MACHINE LEARNING MODEL TO PREDICT 30-DAY ED VISITS AFTER CYSTECTOMY

  The Journal of Urology · 2026-04-27

  article
  PublisherDOI

• Digital Twin-Assisted Resilient Planning for mmWave IAB Networks via Graph Attention Networks

  ArXiv.org · 2025-09-15

  preprintOpen accessSenior author

  Digital Twin (DT) technology enables real-time monitoring and optimization of complex network infrastructures by creating accurate virtual replicas of physical systems. In millimeter-wave (mmWave) 5G/6G networks, the deployment of Integrated Access and Backhaul (IAB) nodes faces highly dynamic urban environments, necessitating intelligent DT-enabled optimization frameworks. Traditional IAB deployment optimization approaches struggle with the combinatorial complexity of jointly optimizing coverage, connectivity, and resilience, often leading to suboptimal solutions that are vulnerable to network disruptions. With this consideration, we propose a novel Graph Attention Network v2 (GATv2)-based reinforcement learning approach for resilient IAB deployment in urban mmWave networks. Specifically, we formulate the deployment problem as a Markov Decision Process (MDP) with explicit resilience constraints and employ edge-conditioned GATv2 to capture complex spatial dependencies between heterogeneous node types and dynamic connectivity patterns. The attention mechanism enables the model to focus on critical deployment locations to maximize coverage and ensure fault tolerance through redundant backhaul connections. To address the inherent vulnerability of mmWave links, we train the GATv2 policy using Proximal Policy Optimization (PPO) with a carefully designed balance between coverage, cost, and resilience. Comprehensive simulations across three urban scenarios demonstrate that our method achieves 98.5-98.7 percent coverage with 14.3-26.7 percent fewer nodes than baseline approaches, while maintaining 87.1 percent coverage retention under 30 percent link failures, representing 11.3-15.4 percent improvement in fault tolerance compared to state-of-the-art methods.

  PublisherOA PDFDOI

• HIFFR: Hybrid Intelligent Fast Failure Recovery Framework for Enhanced Resilience in Software Defined Networks

  2024-07-23 · 1 citations

  articleOpen accessSenior author

  Deploying new optimised routing policies on routers in the event of link failure is difficult due to the strong coupling between the data and control planes and the absence of topology information about the network. Because of the distributed architecture of traditional Internet protocol networks, policies and routing rules are spread in a decentralised way, resulting in looping and congestion problems. Software-defined networking (SDN) enables centralised network programmability. As a result, data plane devices just focus on packet forwarding, leaving the control plane's complexities to be managed by the controller. Thus, the controller centrally installs the policies and rules. Considering the controller's knowledge of the global network architecture, central control enhances the flexibility of link failure identification and restoration. Therefore, this paper uses SDN architecture to enhance network resilience against link failures by introducing the Hybrid Intelligent Fast Failure Recovery (HIFFR) framework, which aims to improve the speed and effectiveness of network failure recovery.

  PublisherOA PDFDOI

• Re: Rakesh Heer, Rebecca Lewis, Thenmalar Vadiveloo, et al. A Randomized Trial of PHOTOdynamic Surgery in Non–muscle-invasive Bladder Cancer. NEJM Evid 2022;1:EVIDoa2200092

  European Urology · 2023-08-12

  articleSenior authorCorresponding
  PublisherDOI

• Association between early postradical cystectomy kidney injury and perioperative outcome in enhanced recovery era

  Urologic Oncology Seminars and Original Investigations · 2023-03-24 · 3 citations

  articleOpen access

  OBJECTIVE: To evaluate the incidence and predictors of early postoperative acute kidney injury (EP-AKI) during index hospitalization following radical cystectomy and its association with postoperative outcomes. METHODS: All patients with bladder cancer who underwent radical cystectomy with intent-to-cure at our center between 2012 and 2020 were reviewed. EP-AKI during index hospitalization was evaluated using the Acute Kidney Injury Network criteria. The association between EP-AKI and demographics, clinicopathologic features, and perioperative outcomes, including length of hospital stay, complication rate, and readmission rate, were examined. A logistic regression analysis was performed to evaluate the predictors of EP-AKI. RESULTS: Overall, 435 patients met eligibility, of whom 112 (26%) experienced EP-AKI during index hospitalization (90 [21%] stage 1, 17 [4%] stage 2, and 5 [1%] stage 3). EP-AKI was associated with a longer mean operative time (6.8 vs. 6.1 hours; P < 0.001), higher mean length of hospital stay (6.3 vs. 5.6; P = 0.02), 30-day complication rate (71% vs. 51%; P < 0.001), 90-day complication rate (81% vs. 69%; P = 0.01) and 90-day readmission rate (37% vs. 33%; P = 0.04). The rate of complications increased at higher stages of AKI. On multivariable analysis, perioperative blood transfusion (OR: 1.84, P = 0.02) and continent diversion (OR: 3.29, P < 0.001) were independent predictors of EP-AKI. CONCLUSION: A quarter of cystectomy patients experience acute kidney injury during index hospitalization, which is associated with higher length of stay, postoperative complication, and readmission rates. Perioperative blood transfusion and continent diversion are independent predictors of such injury.

  PublisherDOI

• Perioperative mortality for radical cystectomy in the modern Era: experience from a tertiary referral center

  International braz j urol · 2023-06-01 · 20 citations

  articleOpen access

  PURPOSE: To evaluate the perioperative mortality and contributing variables among patients who underwent radical cystectomy (RC) for bladder cancer in recent decades, with comparison between modern (after 2010) and premodern (before 2010) eras. MATERIALS AND METHODS: Using our institutional review board-approved database, we reviewed the records of patients who underwent RC for primary urothelial bladder carcinoma with curative intent from January 2003 to December 2019. The primary and secondary outcomes were 90- and 30-day mortality. Univariate and multivariable logistic regression models were applied to assess the impact of perioperative variables on 90-day mortality. RESULTS: A total of 2047 patients with a mean±SD age of 69.6±10.6 years were included. The 30- and 90-day mortality rates were 1.3% and 4.9%, respectively, and consistent during the past two decades. Among 100 deaths within 90 days, 18 occurred during index hospitalization. Infectious, pulmonary, and cardiac complications were the leading mortality causes. Multivariable analysis showed that age (Odds Ratio: OR 1.05), Charlson comorbidity index ≥ 2 (OR 1.82), blood transfusion (OR 1.95), and pathological node disease (OR 2.85) were independently associated with 90-day mortality. Nevertheless, the surgical approach and enhanced recovery protocols had no significant effect on 90-day mortality. CONCLUSION: The 90-day mortality for RC is approaching five percent, with infectious, pulmonary, and cardiac complications as the leading mortality causes. Older age, higher comorbidity, blood transfusion, and pathological lymph node involvement are independently associated with 90-day mortality.

  PublisherOA PDFDOI

• Perioperative mortality for radical cystectomy in the modern Era: experience from a tertiary referral center

  Figshare · 2023-01-01

  datasetOpen access

  ABSTRACT Purpose To evaluate the perioperative mortality and contributing variables among patients who underwent radical cystectomy (RC) for bladder cancer in recent decades, with comparison between modern (after 2010) and premodern (before 2010) eras. Materials and Methods Using our institutional review board-approved database, we reviewed the records of patients who underwent RC for primary urothelial bladder carcinoma with curative intent from January 2003 to December 2019. The primary and secondary outcomes were 90- and 30-day mortality. Univariate and multivariable logistic regression models were applied to assess the impact of perioperative variables on 90-day mortality. Results A total of 2047 patients with a mean±SD age of 69.6±10.6 years were included. The 30- and 90-day mortality rates were 1.3% and 4.9%, respectively, and consistent during the past two decades. Among 100 deaths within 90 days, 18 occurred during index hospitalization. Infectious, pulmonary, and cardiac complications were the leading mortality causes. Multivariable analysis showed that age (Odds Ratio: OR 1.05), Charlson comorbidity index ≥ 2 (OR 1.82), blood transfusion (OR 1.95), and pathological node disease (OR 2.85) were independently associated with 90-day mortality. Nevertheless, the surgical approach and enhanced recovery protocols had no significant effect on 90-day mortality. Conclusion The 90-day mortality for RC is approaching five percent, with infectious, pulmonary, and cardiac complications as the leading mortality causes. Older age, higher comorbidity, blood transfusion, and pathological lymph node involvement are independently associated with 90-day mortality.

  PublisherDOI

• Long‐term renal function in patients with chronic kidney disease following radical cystectomy and orthotopic neobladder

  British Journal of Urology · 2022-01-19 · 12 citations

  article1st authorCorresponding

  Objective To evaluate long‐term renal function in patients with chronic kidney disease (CKD) Stage IIIa who underwent radical cystectomy and orthotopic neobladder (RC/ONB) compared to matched controls. Patients and Methods Using our Institutional Review Board‐approved institutional database, patients with a glomerular filtration rate (GFR) of 45–59.9 mL/min/1.73 m 2 who underwent RC/ONB were identified. A control group of patients with a GFR of ≥60 mL/min/1.73 m 2 was selected. Groups were matched based on age, baseline hypertension/diabetes mellitus, perioperative chemotherapy, and preoperative hydronephrosis. A decrease in GFR of &gt;10 mL/min/1.73 m 2 during the follow‐up was considered significant. A multivariate Cox regression analysis was performed to identify predictors of GFR decline in each group. Results Of 1237 patients who underwent RC/ONB, 508 patients were included (254 per group). The mean preoperative GFR was 53.3 mL/min/1.73 m 2 in the study group and 78.8 mL/min/1.73 m 2 in controls. The median follow‐up was 3.7 years. During follow‐up, GFR stayed at or above baseline in 51% of the study patients compared to 46% of the controls ( P = 0.5). The mean time to a significant GFR decline in the study patients was significantly longer compared to the controls (5.6 vs 2 years, respectively; P &lt; 0.001). In multivariate analysis, neoadjuvant chemotherapy was found to be the strongest predictor of a significant GFR decline as well as GFR decline below baseline (hazard ratio [HR] 2.15, 95% confidence interval [CI] 1.4–3.29, P = 0.004; and HR 2.15, 95% CI 1.4–3.29, P &lt; 0.001, respectively). Conclusion Patients with CKD Stage IIIa who undergo ONB appear to have comparable long‐term renal function to those with a GFR of ≥60 mL/min/1.73 m 2 . An ONB reconstruction is a safe option for patients with CKD Stage IIIa desiring a continent diversion.

  PublisherDOI

Frequent coauthors

• Siamak Daneshmand

  University of Southern California

  66 shared

• Hooman Djaladat

  43 shared

• Anne Schuckman

  University of Southern California

  33 shared

• Gus Miranda

  Keck Hospital of USC

  30 shared

• Nima Baradaran

  University of California, San Francisco

  22 shared

• Laleh Montaser‐Kouhsari

  22 shared

• Gholamreza Pourmand

  Sina Hospital

  21 shared

• Inderbir S. Gill

  21 shared

Labs

• Timm-Nelson LabPI

Education

• PhD, Electrical and Computer Engineering

  University of Tehran

Awards & honors

• Minnesota Monthly Magazine Top Doctors - 2025
• Minnesota Monthly Magazine Top Doctors for Women - 2026
• Urology Surgery Research All-Star by Avant-Garde Health - 20…