The S&P/ASX 200 Index (ASX: XJO) is ending the week in a positive session. In afternoon trade, the benchmark index is up 1.2% to 8,698.9 points.
Four ASX shares that are rising more than most today are listed below. Here's why they are racing higher:

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4DMedical Ltd (ASX: 4DX)
The 4DMedical share price is up 12% to $3.74. This follows news that the respiratory imaging technology provider has signed a commercial agreement with SimonMed Imaging. It is one of the leading outpatient medical imaging providers in the United States. 4DMedical's CEO and founder, Andreas Fouras, said: "SimonMed is one of the largest and most influential outpatient imaging providers in the United States. Their decision to adopt CT:VQ, moving directly to commercial deployment, is a major milestone for 4DMedical and a strong validation of both our technology and our clinical value. In just months since FDA clearance, we have established CT:VQ across leading Academic Medical Centers and are now extending into large-scale imaging networks. This agreement demonstrates that adoption by world-class clinical innovators is translating directly into commercial uptake across high-volume providers."
Elsight Ltd (ASX: ELS)
The Elsight share price is up 16% to $7.36. Investors have been buying the global enablement technologies provider's shares after it received a major follow-on order. Elsight advised that a U.S. based commercial customer in the public safety sector has placed a follow-on order valued at approximately US$2 million (~A$2.8 million). The company's CEO, Yoav Amitai, said: "A U.S Public safety customer increasing their order within months signals strong conviction, highlighting the Company's operational validation and commercial traction. Public safety agencies are preparing for scaled BVLOS operations and selecting technology partners that meet the highest standards of reliability and compliance."
Judo Capital Holdings Ltd (ASX: JDO)
The Judo Capital share price is up 12% to $1.56. This small business lender's shares are lifting off today after it successfully priced a $750 million capital-relief securitisation transaction backed by small and medium enterprise (SME) business loans. It notes that following the transaction, Judo Capital will generate a significant net interest margin on the underlying business loans without needing to hold capital for these assets. Judo Capital's CEO, Chris Bayliss, said: "We are very pleased with the strong support received for this transaction from a broad range of domestic and international investors. The transaction strengthens Judo's CET1 position and increases our flexibility to support continued lending growth, while also improving ROE."
Northern Star Resources Ltd (ASX: NST)
The Northern Star share price is up over 4% to $19.01. Investors have been buying gold miners today after progress appeared to be made with US-Iran peace talks. This put pressure on oil prices, which has lowered interest rate hike expectations, boosting the allure of gold.