diff --git a/core-buffer/include/WriterH5Writer.hpp b/core-buffer/include/WriterH5Writer.hpp
index 353a78a..dae7b39 100644
--- a/core-buffer/include/WriterH5Writer.hpp
+++ b/core-buffer/include/WriterH5Writer.hpp
@@ -6,13 +6,13 @@
 #include <H5Cpp.h>
 #include "buffer_config.hpp"
 
-struct DetectorFrame
+struct ImageMetadata
 {
-    uint64_t pulse_id[core_buffer::WRITER_N_FRAMES_BUFFER];
-    uint64_t frame_index[core_buffer::WRITER_N_FRAMES_BUFFER];
-    uint32_t daq_rec[core_buffer::WRITER_N_FRAMES_BUFFER];
-    uint16_t n_received_packets[core_buffer::WRITER_N_FRAMES_BUFFER];
-    bool     is_good_frame[core_buffer::WRITER_N_FRAMES_BUFFER];
+    uint64_t pulse_id;
+    uint64_t frame_index;
+    uint32_t daq_rec;
+    uint16_t n_received_packets;
+    bool is_good_frame;
 };
 
 class WriterH5Writer {
@@ -35,7 +35,7 @@ public:
             const size_t n_frames,
             const size_t n_modules);
     ~WriterH5Writer();
-    void write(const DetectorFrame* metadata, const char* data);
+    void write(const ImageMetadata* metadata, const char* data);
     void close_file();
 };
 
diff --git a/core-buffer/src/WriterH5Writer.cpp b/core-buffer/src/WriterH5Writer.cpp
index d7cb893..e422f32 100644
--- a/core-buffer/src/WriterH5Writer.cpp
+++ b/core-buffer/src/WriterH5Writer.cpp
@@ -84,7 +84,7 @@ void WriterH5Writer::close_file()
     file_.close();
 }
 
-void WriterH5Writer::write(const DetectorFrame* metadata, const char* data) {
+void WriterH5Writer::write(const ImageMetadata* metadata, const char* data) {
     auto pulse_id_data = (char*)(metadata->pulse_id);
     auto frame_index_data = (char*)(metadata->frame_index);
     auto daq_rec_data = (char*)(metadata->daq_rec);