Energy and Greenhouse Gas Emission Savings Associated with Implementation of an Abbreviated Cardiac MRI Protocol.

Supplemental material is available for this article. See also the article by Lenkinski and Rofsky in this issue. See also the article by McKee et al in this issue.

Planetary Health and Radiology: Why We Should Care and What We Can Do.

Climate change adversely affects the well-being of humans and the entire planet. A planetary health framework recognizes that sustaining a healthy planet is essential to achieving individual, community, and global health. Radiology contributes to the climate crisis by generating greenhouse gas (GHG) emissions during the production and use of medical imaging equipment and supplies. To promote planetary health, strategies that mitigate and adapt to climate change in radiology are needed. Mitigation strategies to reduce GHG emissions include switching to renewable energy sources, refurbishing rather than replacing imaging scanners, and powering down unused scanners. Radiology departments must also build resiliency to the now unavoidable impacts of the climate crisis. Adaptation strategies include education, upgrading building infrastructure, and developing departmental sustainability dashboards to track progress in achieving sustainability goals. Shifting practices to catalyze these necessary changes in radiology requires a coordinated approach. This includes partnering with key stakeholders, providing effective communication, and prioritizing high-impact interventions. This article reviews the intersection of planetary health and radiology. Its goals are to emphasize why we should care about sustainability, showcase actions we can take to mitigate our impact, and prepare us to adapt to the effects of climate change. © RSNA, 2024 Supplemental material is available for this article. See also the article by Ibrahim et al in this issue. See also the article by Lenkinski and Rofsky in this issue.

Environmental Sustainability and MRI: Challenges, Opportunities, and a Call for Action.

The environmental impact of magnetic resonance imaging (MRI) has recently come into focus. This includes its enormous demand for electricity compared to other imaging modalities and contamination of water bodies with anthropogenic gadolinium related to contrast administration. Given the pressing threat of climate change, addressing these challenges to improve the environmental sustainability of MRI is imperative. The purpose of this review is to discuss the challenges, opportunities, and the need for action to reduce the environmental impact of MRI and prepare for the effects of climate change. The approaches outlined are categorized as strategies to reduce greenhouse gas (GHG) emissions from MRI during production and use phases, approaches to reduce the environmental impact of MRI including the preservation of finite resources, and development of adaption plans to prepare for the impact of climate change. Co-benefits of these strategies are emphasized including lower GHG emission and reduced cost along with improved heath and patient satisfaction. Although MRI is energy-intensive, there are many steps that can be taken now to improve the environmental sustainability of MRI and prepare for the effects of climate change. On-going research, technical development, and collaboration with industry partners are needed to achieve further reductions in MRI-related GHG emissions and to decrease the reliance on finite resources. LEVEL OF EVIDENCE: 5 TECHNICAL EFFICACY: Stage 6.

Increasing Diversity in Canadian Radiology: From the Hiring Process to Needed Active Retention Efforts.

The Canadian Association of Radiologists supports equity, diversity, and inclusion (EDI) in employment. It is imperative that institutions implement recruitment and retention practices to ensure a diverse workforce. This requires considerable attention to each step in the process, including the job posting, candidate search, hiring committee composition, interviews, hiring decision, and retention and promotion. Job postings must be widely distributed and visible to underrepresented groups. The candidate search should be completed by a diverse committee with expertise in EDI. All committee members must complete EDI and anti-bias training and conduct a broad search that ensures underrepresented groups are encouraged to apply. Interviews must be offered to all candidates. The hiring decision must avoid the use of subjective criteria. Recruitment of members of underrepresented groups ensures a diverse workforce, and organizations should commit resources to the retention and promotion of these members. Mentorship programs must be implemented and incentives provided to faculty members to serve as mentors. Transparent guidelines for promotion made universally available on department or institution websites. Recruiting a diverse workforce in Medical Imaging will only be achieved if EDI are central to the organization's goals and strategic plan. All organizational policies, practices, and procedures must be reviewed with an intersectional lens to identify potential gaps, areas for improvement, and areas of strength in the recruitment and retention of members of underrepresented groups.

Climate Change and Radiology: Impetus for Change and a Toolkit for Action.

This special report discusses the importance of climate change for health care and radiology. The impact of climate change on human health and health equity, the contribution of health care and medical imaging to the climate crisis, and the impetus for change within radiology to create a more sustainable future are covered. The authors focus on actions and opportunities to address climate change in our role as radiologists. A toolkit highlights actions we can take toward a more sustainable future, linking each action with the expected impact and outcome. This toolkit includes a hierarchy of actions from first steps to advocating for system-level change. This includes actions we can take in our daily lives, in radiology departments and professional organizations, and in our relationships with vendors and industry partners. As radiologists, we are adept at managing rapid technological change, which makes us ideally suited to lead these initiatives. Alignment of incentives and synergies with health systems are highlighted given that many of the proposed strategies also result in cost savings.

Long-term results of PET-guided radiation in patients with advanced-stage diffuse large B-cell lymphoma treated with R-CHOP.

Consolidative radiation therapy (RT) for advanced-stage diffuse large B-cell lymphoma (DLBCL) remains controversial, with routine practice continuing to include RT in patients with initial bulky disease or residual masses. Positron emission tomography (PET)-computed tomography is a sensitive modality for detecting the presence of residual disease at the end of treatment (EOT). A PET-guided approach to selectively administering RT has been the policy in British Columbia since 2005. Patients with advanced-stage DLBCL diagnosed from 1 January 2005 to 1 March 2017 and treated with at least 6 cycles of R-CHOP (cyclophosphamide, doxorubicin, vincristine, and prednisolone plus rituximab), who underwent EOT PET, were included in this analysis. Those with complete metabolic response (PET-negative [PET-NEG]) were observed; those with PET-positive (PET-POS) scans were offered consolidative RT, when feasible. Of the patient records reviewed, 723 were identified, with median follow-up of 4.3 years: 517 (72%) were PET-NEG; 206 (28%) were PET-POS. Time to progression (TTP) and overall survival (OS) at 3 years were 83% vs 56% and 87% vs 64%, in patients with PET-NEG and PET-POS scans, respectively. PET-POS patients with nonprogressing disease treated with consolidative RT (109 and 206; 53%) had outcomes approaching those of PET-NEG patients, with 3-year estimates of 76% and 80% for TTP and OS. PET-NEG patients who had bulky disease (≥10 cm) at diagnosis had outcomes indistinguishable from those without bulk, despite the omission of RT. These data suggest that patients with advanced-stage DLBCL who are PET-NEG at EOT and receive no RT have excellent outcomes. 18F-fluorodeoxyglucose-PET can reliably guide selective administration of consolidative RT, even in patients with initially bulky disease.

Quantitative Assessment of Computed Tomography Energy Use and Cost Savings Through Overnight and Weekend Power Down in a Radiology Department.

Purpose: To assess energy and cost savings when a CT scanner is powered down during overnight non-operational times compared with the CT scanner left on full power or partial shutdown mode. Materials and Methods: Temporary portable power data loggers were placed on the power supply to the CT scanner to measure the energy consumption of the CT scanner in 3 power modes over 9 weeks: system ON (computer on, gantry on), computer ON (computer on/gantry off), and system shutdown (computer off/gantry off). Energy was separated into daily average consumption during normal operating hours and consumption after hours for three different day types: weekdays, Saturdays, and Sundays/Holidays. To estimate savings, the average after hours energy use per day during the system ON was compared to each of the two power saving modes. 95% confidence intervals were calculated for each mode and savings result. Results: Overnight and Sunday system shutdown compared to system ON mode is shown to save approximately 14 000 kWh over one year with a 95% confidence interval of (13 899 kWh, 14 464 kWh) as calculated by the electricity provider. Conclusion: Energy consumed by a CT scanner can be significantly reduced through system shutdown when the unit is non-operational, saving emissions and cost. In addition to cost and energy savings, this study emphasizes the importance of clinician leadership in convening interdisciplinary teams outside of usual healthcare silos to rethink how we purposefully use energy and reduce waste.

Disparities in Radiologist Fee-For-Service Payments by Gender in Canada.

Objective: To examine differences in fee-for-service (FFS) payments to men and women radiologists in Canada and evaluate potential contributors. Methods: Publicly available FFS radiology billing data was analyzed from British Columbia (BC), Ontario (ON), Prince-Edward Island (PEI) and Nova Scotia (NS) between 2017 and 2021. Data was analyzed by gender on a per-province and national level. Variables evaluated included year, province, procedure billings, and days worked (BC and ON only). The gender pay gap was expressed as the difference in mean billing payments between men and women divided by mean payments to men. Results: Data points from 8478 radiologist years were included (2474 [29%] women and 6004 [71%] men). The unadjusted difference in annual FFS billings between men and women was $126,657. Overall, payments to women were 81% of payments to men with a 19% gender pay gap. The difference in billings between men and women did not change significantly between 2017 and 2021 (range in gender pay gap, 17-21%) but did vary by province (highest gap NS). Compared to men, women worked fewer days per year (weighted mean 218 ± 29 vs 236 ± 25 days/year, P < .001, 8% difference). Conclusion: In an analysis of fee-for-service payments to radiologists in 4 Canadian provinces between 2017 and 2021, payments to women were 81% of payments to men with a 19% gender pay gap. Payments were lower to women across all years evaluated. Women worked 8% fewer days per year on average than men, which did not fully account for the difference in FFS billing payments between men and women. Summary Statement: In an analysis of fee-for-service payments to Canadian radiologists between 2017 and 2021, payments to women were 81% of payments to men with a 19% gender pay gap which is not fully accounted for by time spent working.