Patent ID: 7214464

Claim:
A method of forming a positive image in a photothermographic assembly comprising a photothermographic material and an intensifying means for converting ionizing radiation, wherein the assembly has been imagewise exposed to ionizing radiation to form a latent image in the photothermographic material, which photothermographic material has at least one imaging layer comprising a potentially negative-working emulsion, said method further comprising thermally developing the imagewise exposed assembly wherein thermal development of unexposed silver salts in exposed areas is effectively inhibited relative to unexposed areas, thereby producing a positive image and wherein negative image development is inhibited, wherein the imaging layer comprises at least two organic silver salts, a first and a second organic silver salt, wherein the second organic silver salt releases a density-inhibiting agent and has pKsp that is at least 0.5 greater than the pKsp of said first organic silver salt, and wherein the imaging layer further comprises an amine developer or precursor thereof and an oxidized developer scavenging agent to accelerate development by removing oxidized developer as it is formed during the thermal development, which developer scavenging agent is a phenolic coupler.